538.71% is the change from 155 to 990
Calculation steps:
[( 990 - 155 ) ÷ 155] x 100 = 538.71%
Formula
Percentage change = [(990 - 155) / 155] x 100
Subtract the new number by the original number
990 - 155 = 835
835 ÷ 155 = 5.387096774193548
5.387096774193548 x 100 = 538.71%