753.33% is the change from 15 to 128
Calculation steps:
[( 128 - 15 ) ÷ 15] x 100 = 753.33%
Formula
Percentage change = [(128 - 15) / 15] x 100
Subtract the new number by the original number
128 - 15 = 113
113 ÷ 15 = 7.533333333333333
7.533333333333333 x 100 = 753.33%