Question

Express the following rational numbers as decimals numbers
$\frac{115}{4}$

Answer 1

$\frac{115}{4}$

$=115÷4$

$=28.75$

Alternate method:

$\frac{115}{4}$

$=\frac{115}{2^2}$

$=\frac{115}{2^2}\times \frac{5^2}{5^2}$

$=\frac{115\times 25}{(2\times 5{)}^2}$

$=\frac{2875}{(10{)}^2}$

$=\frac{2875}{\left(100\right)}$

$=28.75$

$\therefore \frac{115}{4}=28.75$