HSPT Math : Decimals

Study concepts, example questions & explanations for HSPT Math

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Example Questions

Example Question #1 : Percentage

A watch originally cost $55.00. If it is on sale for 20% off, what is the sale price of the watch?

Possible Answers:

\(\displaystyle \$57.00\)

\(\displaystyle \$66.00\)

\(\displaystyle \$52.55\)

\(\displaystyle \$110.00\)

\(\displaystyle \$44.00\)

Correct answer:

\(\displaystyle \$44.00\)

Explanation:

To solve:

First, find what is 20% of 55 by multiplying:

\(\displaystyle \small 55\cdot .20=11\)

Then, subtract 20% (11) from the original price:

\(\displaystyle \small 55-11=44\)

The final sale price will be $44.00.

Example Question #711 : Hspt Mathematics

Which is largest?

a. 30% of 150

b. 20% of 300

c. 40% of 60

d. 10% of 400

Possible Answers:

\(\displaystyle c\)

\(\displaystyle a\)

\(\displaystyle b\)

\(\displaystyle d\)

Correct answer:

\(\displaystyle b\)

Explanation:

To solve:

First find the corresponding percentage of each multiple choice answer,

a) \(\displaystyle \small 150\cdot .30= 45\)

b)\(\displaystyle \small 300\cdot .20= 60\)

c) \(\displaystyle \small 60\cdot .40= 24\)

d)\(\displaystyle \small 400\cdot .10= 40\)

Then, compare the amounts and select which amount is the largest:

b) 60

Example Question #711 : Hspt Mathematics

How do you write \(\displaystyle \frac{1}{5}\) as a percent?

Possible Answers:

25%

50%

15%

20%

5%

Correct answer:

20%

Explanation:

\(\displaystyle \frac{1}{5}\) is equal to \(\displaystyle \frac{20}{100}\), which is 20%.

Example Question #2 : Percentage

Andrew has completed 80% of the race. If the race is 5000 meters, how far along is Andrew?

 

Possible Answers:

\(\displaystyle 4000\ meters\)

\(\displaystyle 1000\ meters\)

\(\displaystyle 5000\ meters\)

\(\displaystyle 2000\ meters\)

\(\displaystyle 3000\ meters\)

Correct answer:

\(\displaystyle 4000\ meters\)

Explanation:

Multiply the length of the race by the percentage accomplished by Andrew:

\(\displaystyle 5000 \ast .80= 4000\)

Answer: Andrew has completed 4000 meters of the race.

Example Question #3 : Percentage

Which is less?

 

a. 60% of 10

b. 20% of 40

c. 30% of 20

d. 10% of 50

Possible Answers:

\(\displaystyle d\)

\(\displaystyle a\)

\(\displaystyle b\)

\(\displaystyle c\)

Correct answer:

\(\displaystyle d\)

Explanation:

Find the amounts by multiplying each number to the percentage rate:

\(\displaystyle a. 10 \ast .60=6\)

\(\displaystyle b. 40 \ast .20=8\)

\(\displaystyle c. 20 \ast .30=6\)

\(\displaystyle d. 50 \ast .10=5\)

Compare the amounts to find the least. The answer is D.

 

Example Question #671 : Numbers And Operations

A round trip flight is on sale for $425.00. If the flight originally costs $500.00, what percentage was it reduced by?

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 10\)

\(\displaystyle 15\)

\(\displaystyle 20\)

Correct answer:

\(\displaystyle 15\)

Explanation:

Subtract the sale price from the original price:

\(\displaystyle 500-425=75\)

Divide that amount by the original price to find the percentage of the sale.

\(\displaystyle 75 \div 500=.15\)

Answer: The flight was reduced by 15%.

Example Question #4 : How To Find Percentage

Anita is sewing a quilt made of 120 patches. She has sewn together 84 patches already. What percentage of the quilt has Anita sewn?

 

Possible Answers:

\(\displaystyle 36\)

\(\displaystyle 84\)

\(\displaystyle 90\)

\(\displaystyle 70\)

Correct answer:

\(\displaystyle 70\)

Explanation:

Divide 84 by the entire amount of patches 120 to find the percentage completed.

\(\displaystyle 84 \div 120= .70\)

 

The answer is Anita has completed 70% of the quilt.

Example Question #5 : How To Find Percentage

Phil filled up 25 balloons for a party. By the end of the night, only 15 balloons were left; the rest had popped. What percentage of balloons popped throughout the party?

 

Possible Answers:

\(\displaystyle 40\)

\(\displaystyle 20\)

\(\displaystyle 30\)

\(\displaystyle 60\)

Correct answer:

\(\displaystyle 40\)

Explanation:

Subtract  \(\displaystyle 25-15=10\) to find the amount of balloons that popped.

Then, divide \(\displaystyle 10\div 25=.4\)

The answer: 40% of the balloons popped.

Example Question #5 : Percentage

A pair of sneakers is on sale for 20% off the original price of $120.00. What is the sale price of the sneakers?

Possible Answers:

\(\displaystyle \$144.00\)

\(\displaystyle \$100.00\)

\(\displaystyle \$96.00\)

\(\displaystyle \$140.00\)

Correct answer:

\(\displaystyle \$96.00\)

Explanation:

First, multiply 120 by 0.20.

\(\displaystyle 120*.20=24\)

Subtract that amount from the original price:

\(\displaystyle 120-24=96\)

 

Answer: The sneaker's sale price is $96.00

Example Question #1 : Percentage

Carolina needs to complete a 600-word essay for a test she is taking. If she has already written 445 words, what percentage of the essay has she completed? (Round to the nearest percent.)

Possible Answers:

\(\displaystyle 155\)

\(\displaystyle 26\)

\(\displaystyle 1045\)

\(\displaystyle 74\)

Correct answer:

\(\displaystyle 74\)

Explanation:

Divide the number of words completed by the number of words needed:

\(\displaystyle 445 \div 600=0.74\)

Answer: Carolina has completed 74% of the essay.

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