503.91% is the change from 128 to 773
Calculation steps:
[( 773 - 128 ) ÷ 128] x 100 = 503.91%
Formula
Percentage change = [(773 - 128) / 128] x 100
Subtract the new number by the original number
773 - 128 = 645
645 ÷ 128 = 5.0390625
5.0390625 x 100 = 503.91%