539.35% is the change from 155 to 991
Calculation steps:
[( 991 - 155 ) ÷ 155] x 100 = 539.35%
Formula
Percentage change = [(991 - 155) / 155] x 100
Subtract the new number by the original number
991 - 155 = 836
836 ÷ 155 = 5.393548387096774
5.393548387096774 x 100 = 539.35%