56.57% is the change from 99 to 155
Calculation steps:
[( 155 - 99 ) ÷ 99] x 100 = 56.57%
Formula
Percentage change = [(155 - 99) / 99] x 100
Subtract the new number by the original number
155 - 99 = 56
56 ÷ 99 = 0.5656565656565656
0.5656565656565656 x 100 = 56.57%