86.75% is the change from 83 to 155
Calculation steps:
[( 155 - 83 ) ÷ 83] x 100 = 86.75%
Formula
Percentage change = [(155 - 83) / 83] x 100
Subtract the new number by the original number
155 - 83 = 72
72 ÷ 83 = 0.8674698795180723
0.8674698795180723 x 100 = 86.75%