Question

the difference between a number and its two fifth is 510 what is 15% of that number​

Answer 1

Let the number be = x

given that x - 2/5 of x = 510

x - 2x = 510

5

5x - 2x = 210

5

3x = 210 × 5

x = 210 × 5

3

x= 350

The number = 350

15% of 350 = 15 × 350

100

= 52.5