-87.25% is the change from 102 to 13
Calculation steps:
[( 13 - 102 ) ÷ 102] x 100 = -87.25%
Formula
Percentage change = [(13 - 102) / 102] x 100
Subtract the new number by the original number
13 - 102 = -89
-89 ÷ 102 = -0.8725490196078431
-0.8725490196078431 x 100 = -87.25%