-34.11% is the change from 129 to 85
Calculation steps:
[( 85 - 129 ) ÷ 129] x 100 = -34.11%
Formula
Percentage change = [(85 - 129) / 129] x 100
Subtract the new number by the original number
85 - 129 = -44
-44 ÷ 129 = -0.34108527131782945
-0.34108527131782945 x 100 = -34.11%