Question

Fill in the missing fraction: $\boxed{}-\frac{3}{21}=\frac{5}{21}$

Answer 1

Find the missing fraction:

Given, $\boxed{}-\frac{3}{21}=\frac{5}{21}$

Let the missing fraction be $x$, then,

$x-\frac{3}{21}=\frac{5}{21}$

$\Rightarrow x=\frac{3}{21}+\frac{5}{21}$

$=\frac{8}{21}$

Hence, $\boxed{\frac{\mathbf{8}}{\mathbf{21}}}\mathbf{-}\frac{\mathbf{3}}{\mathbf{21}}\mathbf{=}\frac{\mathbf{5}}{\mathbf{21}}$