Question

Which of the following options is equivalent to $\frac{45}{2}$?

• A. 2.25
• B. 22.5
• C. 90
• D. 9

Answer 1

The correct option is B 22.5

Convert $\frac{45}{2}$ into decimal form

The numberator and denominator are multiplied by 5 to get the power of 10 in the denominator.
$\frac{45}{2}=\frac{45\times 5}{2\times 5}=\frac{225}{10}$

In $\frac{225}{10}$, there is one zero in the denominator. So, count one place from the right in the numerator and place the decimal point to the left of the digit.

$\frac{225}{10}=22.5$