Question

If you triple one eighth of my number you get 9

Answer 1

So three times an eighth of the number (let's call it n) is 9.
3n/8 = 9
3n = 9*8
3n = 72
n = 72/3
n = 24
So the number must be 24

Answer 2

9÷3=3

3x8=24

So your answer is 24!