98.84% is the change from 86 to 171
Calculation steps:
[( 171 - 86 ) ÷ 86] x 100 = 98.84%
Formula
Percentage change = [(171 - 86) / 86] x 100
Subtract the new number by the original number
171 - 86 = 85
85 ÷ 86 = 0.9883720930232558
0.9883720930232558 x 100 = 98.84%