-85.23% is the change from 88 to 13
Calculation steps:
[( 13 - 88 ) ÷ 88] x 100 = -85.23%
Formula
Percentage change = [(13 - 88) / 88] x 100
Subtract the new number by the original number
13 - 88 = -75
-75 ÷ 88 = -0.8522727272727273
-0.8522727272727273 x 100 = -85.23%