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Write $\frac{9}{20}$ as a decimal number.

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Convert between decimals and fractions

Full solution

Q. Write

\frac{9}{20}

as a decimal number.

Convert Fraction to Decimal: Convert the fraction $\frac{9}{20}$ to a decimal by finding an equivalent fraction with $100$ as the denominator. $\newline$ To do this, we need to find a number that $20$ can be multiplied by to get $100$ . Since $20 \times 5 = 100$ , we multiply both the numerator and the denominator by $5$ . $\newline$ $(9 \times 5) / (20 \times 5) = \frac{45}{100}$
Find Equivalent Fraction: Write $45/100$ as a decimal number. $\newline$ Since the denominator is $100$ , we can easily convert this to a decimal by moving the decimal point two places to the left. $\newline$ $45/100 = 0.45$

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