120 is 30% of what number?

1 Answer
Nov 9, 2016

Answer:

The number is #400#

Explanation:

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#