$700 because if it was 1/5 of the original, if you multiply by 5, it gives you your answer.
Here, the number is = 9/15/18
We can re-write it as: 9 /15*18 = 9/270 = 1/30
In short, Your Answer would be 1/30
Hope this helps!
First you have to set up your equation. 5x+80 and x+15.
