500.78% is the change from 128 to 769
Calculation steps:
[( 769 - 128 ) ÷ 128] x 100 = 500.78%
Formula
Percentage change = [(769 - 128) / 128] x 100
Subtract the new number by the original number
769 - 128 = 641
641 ÷ 128 = 5.0078125
5.0078125 x 100 = 500.78%