505.47% is the change from 128 to 775
Calculation steps:
[( 775 - 128 ) ÷ 128] x 100 = 505.47%
Formula
Percentage change = [(775 - 128) / 128] x 100
Subtract the new number by the original number
775 - 128 = 647
647 ÷ 128 = 5.0546875
5.0546875 x 100 = 505.47%