642.19% is the change from 128 to 950
Calculation steps:
[( 950 - 128 ) ÷ 128] x 100 = 642.19%
Formula
Percentage change = [(950 - 128) / 128] x 100
Subtract the new number by the original number
950 - 128 = 822
822 ÷ 128 = 6.421875
6.421875 x 100 = 642.19%