Question

Find the value of $X,$ if $\frac{2}{3}+\frac{X}{3}=1.$

Answer 1

$\frac{2}{3}$ means we have 2 equal pieces out of 3, so it can be represented as
1 can be written as $\frac{3}{3},$ means we have 3 equal pieces out of 3, so it can be represented as
Thus, we have to add one red region to the first figure to get the second figure
$\therefore \frac{2}{3}+\frac{1}{3}=\frac{3}{3}=1$
$\Rightarrow X=1$