Question

A fruit seller sells $40\%$ of his apples and is left with $420$ apples. How many apples did he have initially?​

Answer 1

Let the number of apples fruit seller initially had be $x$.
Percentage of apples left with him $=100-40=60\%$

$\Rightarrow 60\%$ of $x=420$
$\Rightarrow \frac{60}{100}\times x=420$
$\Rightarrow x=700$

$\therefore$ The number of apples the fruit seller initially had with him was $700$.