20% more than 15 of anything is 18 of the same thing.
If 250 increased to 300, the percentage increased by 20 percent.
20 increased by 7% = 20* (1+7/100) = 20*1.07 = 21.4
There will be an overall increase in the first number.
200 + 20% = 240
100 + 20% = 120
360
900
360
6
75.6
116.40
744