Question

30% of a (blank) is 60

Answer 1

30% of 200 is 60
You can set up a proportion like so:
30%/100=60/x then you cross multiply to get the answer 

Answer 2

The answer would 200, since 30% of 100 would be 30, then if you multiply than x2, than you get 200.

So, 30% of 200 is 60.