You need to start off thinking of what 60% means.
A percent is a ratio (fraction) of a given number divided by 100. Drawn as a fraction, it looks like this:
60
60% = ----- 100
Now, a bit of Junior High Algebra, and we can now write it as an
equation and solve for X.
60
---- x 120 = X
100
When we multiply fractions by whole numbers t is the equivalent of 60 120
---- x ---- = X
100 1 To multiply two fractions together, you multiply the top and the bottom
separately... 60 120 60 x 120 7200
---- x ---- = --------------- = -------- = X
100 1 100 x 1 100 and, the final step is to simply the fraction and (hope) that it can become a whole number again without any remainder...
__72__r.0
100 | 7200
- 700
---
200
- 200
---------
0 Therefore, our answer is 72.
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