Question

Find the ratio between a number and the number obtained by adding one-fifth of that number to it?

Answer 1

Let the no. be x and $\frac{1}{5}$ of that no. $=\frac{x}{5}$

Ratio Required : $\frac{x}{x+\frac{x}{5}}=\frac{x}{\frac{6x}{5}}=\frac{5}{6}=5:6$