ACT Math : Fractions

Study concepts, example questions & explanations for ACT Math

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Example Questions

Example Question #151 : Fractions

What is \frac{23}{4} written as a mixed number?

Possible Answers:

5\frac{3}{4}

4\frac{1}{4}

5\frac{1}{2}

2\frac{1}{4}

Correct answer:

5\frac{3}{4}

Explanation:

 goes into  five times with a remainder of

The denominator does not change. 

Example Question #1473 : Sat Mathematics

Which of the following is the mixed fraction equivalent to ?

Possible Answers:

Correct answer:

Explanation:

To begin, notice that using your calculator, you can find:

Now, the closest even multiple of  that is less than  is .  Therefore, you know that your number is:

This is the same as:

, or simply, .  This is your mixed fraction.

Example Question #1 : Mixed / Improper Fractions

Which of the following is equivalent to ?

Possible Answers:

Correct answer:

Explanation:

Although there are many ways to convert improper fractions into mixed fractions, the easiest way is to use your calculator to your advantage.  Begin by dividing  by .  This gives you . Therefore, you can eliminate all the options that have do not have  for their first portion. Next, multiply  by the denominator (), and get .  This means that you have  and , or .  Thus, your answer is .

Example Question #152 : Fractions

What does  equal, expressed as a mixed number?

Possible Answers:

Correct answer:

Explanation:

Simplify the two fractions, then find a common denominator, then solve.

Example Question #4 : How To Find Out A Mixed Fraction From An Improper Fraction

Convert the improper fraction to a mixed number. Reduce all fractions if possible.

Possible Answers:

Correct answer:

Explanation:

To convert a mixed number into a fraction, first divide the denominator into the numerator and record the remainder:

.

the result is the mixed number, with the remainder being put as the numerator over the old denominator:
 when we reduce.

Example Question #1 : How To Multiply Fractions

What value of s makes the equation \frac{7}{s}=\frac{8}{10} true?

Possible Answers:

7.5

8.75

9

9.25

9.5

Correct answer:

8.75

Explanation:

We can simply cross multiply to obtain 70=8s and divide by 8 to solve for s.

Example Question #2 : How To Multiply Fractions

Simplfiy the following expression;

Possible Answers:

Correct answer:

Explanation:

Multiply the numerators  2 x 6 x 4 = 48. Then multiply the denominators 3 x 8 x 12 = 288.  The answer is 48/288. To simplify, divide both numerator and denominator by 48 to get 1/6.

 

Example Question #2 : How To Multiply Fractions

Evaluate –3–2 * 2–3.

Possible Answers:

Correct answer:

Explanation:

Because the exponents are negative, we can convert –3–2  to 1/9 and 2–3 to 1/8. We then multiply straight across the top and the bottom, giving you 1/72.

Example Question #3 : How To Multiply Fractions

Simplify the following into one fraction

Possible Answers:

Correct answer:

Explanation:

To multiply fractions you multiply the entire numerator and the entire denominator together. However, before we do that we can cancel anything from the denominator with anything in the numerator. 

Six cancels with 12

5 cancels with 25 

multiply it all out and get

Example Question #153 : Fractions

\dpi{100} \small \frac{1}{3}\div \frac{3}{5} =

Possible Answers:

\dpi{100} \small \frac{3}{8}

\dpi{100} \small \frac{5}{9}

\dpi{100} \small \frac{2}{3}

\dpi{100} \small \frac{1}{5}

\dpi{100} \small \frac{2}{5}

Correct answer:

\dpi{100} \small \frac{5}{9}

Explanation:

Cross multiply or multiply using the reciprocal of the second fraction. 

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