500.78% is the change from 129 to 775
Calculation steps:
[( 775 - 129 ) ÷ 129] x 100 = 500.78%
Formula
Percentage change = [(775 - 129) / 129] x 100
Subtract the new number by the original number
775 - 129 = 646
646 ÷ 129 = 5.007751937984496
5.007751937984496 x 100 = 500.78%