537.5% is the change from 128 to 816
Calculation steps:
[( 816 - 128 ) ÷ 128] x 100 = 537.5%
Formula
Percentage change = [(816 - 128) / 128] x 100
Subtract the new number by the original number
816 - 128 = 688
688 ÷ 128 = 5.375
5.375 x 100 = 537.5%
Example