Question

Find the value for ? to make the equation true. Enter the answer in the box.28/100= ?/10 + 8/100? =

Answer 1

The mathematical equation given is,

$\frac{28}{100}=\frac{\text{?}}{10}+\frac{8}{100}$

SOLUTION

Multiply through by the L.C.M of the denominators (100)

$\begin{gathered} 100\times\frac{28}{100}=100\times\frac{?}{10}+100\times\frac{8}{100} \\ 28=10\text{?}+8 \end{gathered}$

Simplify

Subtract 8 from both sides

$\begin{gathered} 28-8=10\text{?}+8-8 \\ 20=10\text{?} \end{gathered}$

Divide both sides by 10

$\begin{gathered} \frac{20}{10}=\frac{10\text{?}}{10} \\ 2=\text{?} \\ \therefore?\text{ = 2} \end{gathered}$

Hence, the answer is 2.