397.66% is the change from 128 to 637
Calculation steps:
[( 637 - 128 ) ÷ 128] x 100 = 397.66%
Formula
Percentage change = [(637 - 128) / 128] x 100
Subtract the new number by the original number
637 - 128 = 509
509 ÷ 128 = 3.9765625
3.9765625 x 100 = 397.66%