120 is 30% of what number?

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Answer 1 · 2016-11-09T14:00:44

The number is #400#

Let #x# be "what number". We can then write this problem as:

#30%# of #x = 120#

or

#30/100 x = 120#

Solveing for #x# while keeping the equation balanced gives:

#100/30 30/100 x = 120 100/30#

#x = 12000/30#

#x = 400#