Algebra 1 : Algebra 1

Study concepts, example questions & explanations for Algebra 1

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Example Questions

Example Question #24 : Percent Of Change

Find the percent of increase from \displaystyle \small 26 to \displaystyle \small 35

Possible Answers:

\displaystyle \small 45\%

\displaystyle \small \approx35\%

\displaystyle \small \approx32\%

\displaystyle \small \approx95\%

Correct answer:

\displaystyle \small \approx35\%

Explanation:

For this type of problem we use this formula: 

\displaystyle \small \frac{difference}{original} \times 100.

"Difference" is simply the difference between the two numbers given, and "original" is the number that is stated usually after the word "from" , example: from ____ to ____.

In this problem our formula will be filled in as follows: 

\displaystyle \small \small \frac{35-26}{26} \times 100 = \frac{9}{26}\times 100 \approx35\%.

This our percent increase.

Example Question #31 : How To Find The Percent Of Increase

Find the percent of increase from \displaystyle \small 35 to \displaystyle \small 46

Possible Answers:

\displaystyle \small \approx35\%

\displaystyle \small \approx31\%

\displaystyle \small \approx34\%

\displaystyle \small \approx21\%

Correct answer:

\displaystyle \small \approx31\%

Explanation:

For this type of problem we use this formula: 

\displaystyle \small \frac{difference}{original} \times 100.

"Difference" is simply the difference between the two numbers given, and "original" is the number that is stated usually after the word "from" , example: from ____ to ____.

In this problem our formula will be filled in as follows: 

\displaystyle \small \frac{46-35}{35} \times 100 = \frac{11}{35}\times 100 \approx31\%.

This our percent increase.

Example Question #32 : How To Find The Percent Of Increase

Find the percent of increase from \displaystyle \small 100 to \displaystyle \small 154

Possible Answers:

\displaystyle \small 545\%

\displaystyle \small 24\%

\displaystyle \small 52\%

\displaystyle \small 54\%

Correct answer:

\displaystyle \small 54\%

Explanation:

For this type of problem we use this formula: 

\displaystyle \small \frac{difference}{original} \times 100.

"Difference" is simply the difference between the two numbers given, and "original" is the number that is stated usually after the word "from" , example: from ____ to ____.

In this problem our formula will be filled in as follows: 

\displaystyle \small \small \frac{154-100}{100} \times 100 = \frac{54}{100}\times 100 = 54\%.

This our percent increase.

Example Question #31 : How To Find The Percent Of Increase

Find the percent of increase from \displaystyle \small 14 to \displaystyle \small 45

Possible Answers:

\displaystyle \small \approx241\%

\displaystyle \small \approx221\%

\displaystyle \small \approx211\%

\displaystyle \small \approx21\%

Correct answer:

\displaystyle \small \approx221\%

Explanation:

For this type of problem we use this formula: 

\displaystyle \small \frac{difference}{original} \times 100.

"Difference" is simply the difference between the two numbers given, and "original" is the number that is stated usually after the word "from" , example: from ____ to ____.

In this problem our formula will be filled in as follows: 

\displaystyle \small \frac{45-14}{14} \times 100 = \frac{31}{14}\times 100 \approx221\%.

This our percent increase.

Example Question #34 : How To Find The Percent Of Increase

Find the percent of increase from \displaystyle 16 to \displaystyle 27.  

Possible Answers:

\displaystyle \approx69\%

\displaystyle \approx29\%

\displaystyle \approx99\%

\displaystyle \approx89\%

Correct answer:

\displaystyle \approx69\%

Explanation:

For this type of problem we use this formula: 

\displaystyle \small \frac{difference}{original} \times 100.

"Difference" is simply the difference between the two numbers given, and "original" is the number that is stated usually after the word "from" , example: from ____ to ____.

In this problem our formula will be filled in as follows: 

\displaystyle \small \small \frac{27-16}{16} \times 100 = \frac{11}{16}\times 100 \approx69\%.

This our percent increase.

Example Question #31 : How To Find The Percent Of Increase

Find the percent increase from \displaystyle \small 10 to \displaystyle \small 20

Possible Answers:

\displaystyle \small 200\%

\displaystyle \small 48\%

\displaystyle \small 100\%

\displaystyle \small 90\%

Correct answer:

\displaystyle \small 100\%

Explanation:

For this type of problem we use this formula: 

\displaystyle \small \frac{difference}{original} \times 100.

"Difference" is simply the difference between the two numbers given, and "original" is the number that is stated usually after the word "from" , example: from ____ to ____.

In this problem our formula will be filled in as follows: 

\displaystyle \small \small \frac{20-10}{10} \times 100 = \frac{10}{10}\times 100 =100\%.

This our percent increase.

Example Question #31 : Percent Of Change

Find the percent of increase from \displaystyle \small 89 to \displaystyle \small 90

Possible Answers:

\displaystyle \small \approx 3\%

\displaystyle \small \approx 2\%

\displaystyle \small \approx 1\%

\displaystyle \small \approx9\%

Correct answer:

\displaystyle \small \approx 1\%

Explanation:

For this type of problem we use this formula: 

\displaystyle \small \frac{difference}{original} \times 100.

"Difference" is simply the difference between the two numbers given, and "original" is the number that is stated usually after the word "from" , example: from ____ to ____.

In this problem our formula will be filled in as follows: 

\displaystyle \small \frac{90-89}{89} \times 100 = \frac{1}{89}\times 100 \approx 1\%.

This our percent increase.

Example Question #31 : Percent Of Change

Find the percent of increase from \displaystyle \small 60 to \displaystyle \small 73

Possible Answers:

\displaystyle \small \approx 12\%

\displaystyle \small \approx 82\%

\displaystyle \small \approx 42\%

\displaystyle \small \approx 22\%

Correct answer:

\displaystyle \small \approx 22\%

Explanation:

For this type of problem we use this formula: 

\displaystyle \small \frac{difference}{original} \times 100.

"Difference" is simply the difference between the two numbers given, and "original" is the number that is stated usually after the word "from" , example: from ____ to ____.

In this problem our formula will be filled in as follows: 

\displaystyle \small \small \frac{73-60}{60} \times 100 = \frac{13}{60}\times 100 \approx 22\%.

This our percent increase.

Example Question #32 : How To Find The Percent Of Increase

Find the percent increase from \displaystyle \small 80 and \displaystyle 90

Possible Answers:

\displaystyle \small 12.5\%

\displaystyle \small 10.5\%

\displaystyle \small 2.5\%

\displaystyle \small 10.5\%

Correct answer:

\displaystyle \small 12.5\%

Explanation:

For this type of problem we use this formula: 

\displaystyle \small \frac{difference}{original} \times 100.

"Difference" is simply the difference between the two numbers given, and "original" is the number that is stated usually after the word "from" , example: from ____ to ____.

In this problem our formula will be filled in as follows: 

\displaystyle \small \frac{90-80}{80} \times 100 = \frac{10}{80}\times 100 = 12.5\%.

This our percent increase.

Example Question #32 : How To Find The Percent Of Increase

Find the percent of increase from \displaystyle \small 55 to \displaystyle \small 67

Possible Answers:

\displaystyle \small \approx24\%

\displaystyle \small \approx29\%

\displaystyle \small \approx22\%

\displaystyle \small \approx32\%

Correct answer:

\displaystyle \small \approx22\%

Explanation:

For this type of problem we use this formula: 

\displaystyle \small \frac{difference}{original} \times 100.

"Difference" is simply the difference between the two numbers given, and "original" is the number that is stated usually after the word "from" , example: from ____ to ____.

In this problem our formula will be filled in as follows: 

\displaystyle \small \small \frac{67-55}{55} \times 100 = \frac{12}{55}\times 100 \approx22\%.

This our percent increase.

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