Question

If 2/7 of a number increased by 25 gives 45 find the number

Answer 1

Let the number be x.

By condition,

2x\7 +25=45

=>2x\7= 45 - 25

=> 2x\7 =20

=>x = 20×7\2

=>x = 70

Hence, the number is 70.

Answer 2

Given: $\frac{2}{7}$ of a number, when increased by 25, gives 45

To find: The number

Let: The number be $x$

Solution: According to the given question,

If  $\frac{2}{7}$ of a number increased by 25, it gives 45.

i.e.,  $\frac{2}{7}$ of  $x$ + 25 = 45

∵ $\frac{2}{7}x + 25 = 45$

⇒ $\frac{2}{7}x = 45 - 25 = 20$

⇒ $x = \frac{20*7}{2} = 70$

Verification:

⇒ $\frac{2}{7} * 70 + 25 = 20 + 25 = 45$ (verified)

Hence, the number is 70.