-34.88% is the change from 86 to 56
Calculation steps:
[( 56 - 86 ) ÷ 86] x 100 = -34.88%
Formula
Percentage change = [(56 - 86) / 86] x 100
Subtract the new number by the original number
56 - 86 = -30
-30 ÷ 86 = -0.3488372093023256
-0.3488372093023256 x 100 = -34.88%