# How do you write 9/20 as a decimal?

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65
Apr 2, 2018

$\frac{9}{20} = 9 \div 20 = 0.45$

#### Explanation:

Another way to look at this is:

$\frac{9}{20} = \frac{9}{20} \times \frac{5}{5} = \frac{9 \times 5}{20 \times 5} = \frac{45}{100} = 0.45$

Then teach the underlying concepts
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#### Explanation

Explain in detail...

#### Explanation:

I want someone to double check my answer

1
Ujjwal Share
Apr 2, 2018

0.45

#### Explanation:

$9 \div 20$

$\implies \frac{9}{20}$

Convert the denominator into powers of 2 and 5.

=> 9/(2xx2xx5

=> 9/(2^2xx5^1

Now multiply both numerator and denominator with 5 to make the powers of 2 and 5 equal.

=> (9xx5)/(2^2xx5xx5

=> 45/(2^2xx5^2

You can combine the bases with same powers

$\implies \frac{45}{10} ^ 2$

$\implies \frac{45}{100}$

$\implies 0.45$

Hope it helps

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