Question

Sixty-five per cent of a number is$21$ less than four-fifth of that number. What is the number?

Answer 1

Let the number be $x$

$$\begin{gathered} 4\times \frac{x}{5}–65\%ofx=21 \\ \frac{4x}{5}–65\times \frac{x}{100}=21 \\ x=140 \end{gathered}$$

Hence, the number is $140$