90.7% is the change from 86 to 164
Calculation steps:
[( 164 - 86 ) ÷ 86] x 100 = 90.7%
Formula
Percentage change = [(164 - 86) / 86] x 100
Subtract the new number by the original number
164 - 86 = 78
78 ÷ 86 = 0.9069767441860465
0.9069767441860465 x 100 = 90.7%