120 is 30% of what number?

Question

11998 views around the world

You can reuse this answer
Creative Commons License

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#