ISEE Middle Level Math : Fractions

Study concepts, example questions & explanations for ISEE Middle Level Math

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Example Questions

Example Question #1 : Fractions

Rewrite \(\displaystyle \frac{5}{8}\) as a decimal.

Possible Answers:

\(\displaystyle 0.6\)

\(\displaystyle 0.85\)

\(\displaystyle 0.58\)

\(\displaystyle 0.625\)

\(\displaystyle 1.6\)

Correct answer:

\(\displaystyle 0.625\)

Explanation:

Divide \(\displaystyle 5\) by \(\displaystyle 8\); the result is \(\displaystyle 0.625\).

You may also recognize that \(\displaystyle \frac{1}{8}\) is equal to \(\displaystyle 0.125\), and \(\displaystyle \frac{5}{8}\) will be equal to \(\displaystyle 5\) times this value.

\(\displaystyle \frac{5}{8}=5\frac{1}{8}=5(0.125)=0.625\)

Example Question #1 : How To Find The Decimal Equivalent Of A Fraction

Write the decimal equivalent of \(\displaystyle \frac{3}{500}\).

Possible Answers:

\(\displaystyle 0.0015\)

\(\displaystyle 0.006\)

\(\displaystyle 0.00015\)

\(\displaystyle 0.15\)

\(\displaystyle 0.0006\)

Correct answer:

\(\displaystyle 0.006\)

Explanation:

\(\displaystyle \frac{3}{500} = 3 \div 500 = 0.006\)

Example Question #3 : Fractions

How do you write 0.125 as a fraction?

Possible Answers:

\(\displaystyle \frac{1}{125}\)

\(\displaystyle \frac{2}{9}\)

\(\displaystyle \frac{1}{10}\)

\(\displaystyle \frac{1}{8}\)

\(\displaystyle \frac{1}{12}\)

Correct answer:

\(\displaystyle \frac{1}{8}\)

Explanation:

\(\displaystyle 0.125=\frac{125}{1000}=\frac{1}{8}\)

Example Question #2 : How To Find The Decimal Equivalent Of A Fraction

Express \(\displaystyle \frac{9}{25}\) as a decimal.

Possible Answers:

\(\displaystyle 0.35\)

\(\displaystyle 0.33\)

\(\displaystyle 0.27\)

\(\displaystyle 0.36\)

\(\displaystyle 0.45\)

Correct answer:

\(\displaystyle 0.36\)

Explanation:

Divide the numerator by the denominator:

\(\displaystyle 9 \div 25 = 0.36\)

Example Question #5 : Fractions

Express 0.36 as a fraction in simplest form.

Possible Answers:

\(\displaystyle \frac{9}{20}\)

\(\displaystyle \frac{9}{16}\)

\(\displaystyle \frac{9}{25}\)

\(\displaystyle \frac{7}{20}\)

\(\displaystyle \frac{7}{16}\)

Correct answer:

\(\displaystyle \frac{9}{25}\)

Explanation:

Write the expression, without the decimal point (36), over the apporpriate power of 10 (100, since the last digit falls in the hundredths place). Then reduce:

\(\displaystyle \frac{36}{100} = \frac{36\div 4}{100\div 4} = \frac{9}{25}\)

Example Question #5 : How To Find The Decimal Equivalent Of A Fraction

Which is equivalent to this fraction?

\(\displaystyle \frac{2}{5}\)

Possible Answers:

\(\displaystyle .5\)

\(\displaystyle .6\)

\(\displaystyle .2\)

\(\displaystyle .4\)

Correct answer:

\(\displaystyle .4\)

Explanation:

Divide: \(\displaystyle \frac{2}{5}= .4\)

 

 

Example Question #1 : Fractions

Write as a decimal: \(\displaystyle \frac{17}{45}\)

Possible Answers:

\(\displaystyle 0.3\overline{7}\)

\(\displaystyle 0.378\)

\(\displaystyle 0.387\)

\(\displaystyle 0.37\)

\(\displaystyle 0.3\overline{8}\)

Correct answer:

\(\displaystyle 0.3\overline{7}\)

Explanation:

Divide 17 by 45, adding a decimal point and zeroes as needed:

\(\displaystyle 17 \div 45 = 0.37777...\)

The 7 repeats infinitely. The decimal is therefore \(\displaystyle 0.3\overline{7}\).

Example Question #1041 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Write as a fraction in lowest terms: \(\displaystyle 0.4\overline{8}\)

Possible Answers:

\(\displaystyle \frac{24}{49}\)

\(\displaystyle \frac{4}{9}\)

\(\displaystyle \frac{12}{25}\)

\(\displaystyle \frac{22}{45}\)

\(\displaystyle \frac{16}{33}\)

Correct answer:

\(\displaystyle \frac{22}{45}\)

Explanation:

We can use algebra to find the fraction by setting \(\displaystyle N = 0.4\overline{8}\). Then:

\(\displaystyle 100 \cdot N = 100 \cdot 0.4888...\)

\(\displaystyle 100 N = 48.888...\)

and

\(\displaystyle 10 \cdot N = 10 \cdot 0.4888...\)

\(\displaystyle 10 N = 4.888...\)

Subtract as follows:

\(\displaystyle \begin{matrix} \; \; \; 100N& =&48.888... \\ \underline{\; \;- 10N}& =& \underline{ \; \; 4.888...}\\ \; \; \; \; 90N&= & 44\; \; \; \; \; \; \; \; \end{matrix}\)

\(\displaystyle 90N \div 90= 44\div 90\)

\(\displaystyle N = \frac{44}{90} = \frac{44\div 2}{90\div 2} = \frac{22}{45}\)

Example Question #7 : How To Find The Decimal Equivalent Of A Fraction

Convert 0.017 into a fraction.

Possible Answers:

\(\displaystyle 17/10\)

\(\displaystyle 17/1000\)

\(\displaystyle 17/10000\)

\(\displaystyle 17/100\)

Correct answer:

\(\displaystyle 17/1000\)

Explanation:

0.017 is equal to 17 thousandths (because it extends 3 decimal places), therefore:

\(\displaystyle 0.017=17/1000\)

Example Question #1 : How To Find The Decimal Equivalent Of A Fraction

Write as a decimal: \(\displaystyle \frac{13}{75}\)

Possible Answers:

\(\displaystyle 0.\overline{1731}\)

\(\displaystyle 0.17\overline{3}\)

\(\displaystyle 0.1\overline{73}\)

\(\displaystyle 0.\overline{173}\)

\(\displaystyle 0.173\)

Correct answer:

\(\displaystyle 0.17\overline{3}\)

Explanation:

Divide 13 by 75, adding a decimal point and zeroes as needed:

\(\displaystyle 13 \div 75 = 0.17333...\)

The 3 repeats infinitely, so we can rewrite this as \(\displaystyle 0.17\overline{3}\).

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