Question

3. If 40% of a number is 52, find the number.​

Answer 1

Answer:

let the unknown number be x

40% × x=52

40/100×x=52

x=52×100/40

x=52×5/2

x=26×5

x=130

so the number is 130

Answer 2

$let \: the \: req \: no \: be \: x \\ = 40\% \: of \: x \: = 52 \\ = \frac{40}{100} x = 52 \\ = \frac{2}{5} x = 52 \\ = \frac{5}{2} \times \frac{2}{5} x = \frac{5}{2} \times 52 \\ = x = 5 \times 26 \\ = x = 130$

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