-34.12% is the change from 85 to 56
Calculation steps:
[( 56 - 85 ) ÷ 85] x 100 = -34.12%
Formula
Percentage change = [(56 - 85) / 85] x 100
Subtract the new number by the original number
56 - 85 = -29
-29 ÷ 85 = -0.3411764705882353
-0.3411764705882353 x 100 = -34.12%