Question

2/3 of a number is 20 less than the original numbers​ find the numbers

Answer 1

Lets work out for the extreme case. 

Let x be a number

Now, 2/3 of it is less than twenty

∴ $\frac{2}{3} x \ \textless \ 20$

Thus, x < 30.

Thus all the numbers which are less than 30 will be inlcuded.