3 years ago

What is the number if 5/7 of it is 15

Mathematics

1 answer:

Nady [450]3 years ago

7 0

Answer: 21

Step-by-step explanation:

Let the number be $x$ , then ;

$\frac{5}{7}$ of $x$ = $15$

that is :

$\frac{5x}{7}=15$

$5x = 15(7)$

$5x = 105$

divide through by 5

$x = 21$

Therefore : the number is 21

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