Question

A fruit-seller had some apples. He sells $40\%$ of them and still has $420$ apples. Find the number of apples he had originally.

Answer 1

Find the initial number of apples the seller originally had.

Assume that the fruit seller initially had $100$ apples

He sell $40\%$ of them = $40$ apples

Left out apples = $\left(100-40\right)=60$

In initial amount of apples if $60$ of them are remaining = $100$

In initial amount of apples if $1$ of them is remaining = $\frac{100}{60}$

In initial amount of apples if $420$ of them are remaining = $\frac{100}{60}\times 420$

$$\begin{gathered} =100\times 7 \\ =700 \end{gathered}$$

Hence, the fruit seller had $700$ apples.