-47.56% is the change from 164 to 86
Calculation steps:
[( 86 - 164 ) ÷ 164] x 100 = -47.56%
Formula
Percentage change = [(86 - 164) / 164] x 100
Subtract the new number by the original number
86 - 164 = -78
-78 ÷ 164 = -0.47560975609756095
-0.47560975609756095 x 100 = -47.56%