How do you raise a number to a power other than two

The most straightforward way to convert a positive power of two into the form 2n is to count the number n of divisions by 2 that it takes to reach a quotient of 1. For example, the number 524,288 requires 19 divisions to reach 1, giving 219: 524,288/2 = 262,144.Nov 14, 2008

75% of 4= 3      60% of 120=  72

13+72= 85

I think its 85