117
13 add something equals 30 = 43
200
That would be called Addition.
126
100
It is as simple as doing this on a calculator. 162.16 X 1.1 =178.376. To add 10 % multiply by 1.1. To add 30%, 1.3. 125%, 2.25. See the pattern? The percent divided by 100 plus one.
10
59 + 41 = 100
5.3999999999999995
92.97999999999999
15 + ? = 100 is the same as 100 - 15 So the answer is 85