-15.69% is the change from 102 to 86
Calculation steps:
[( 86 - 102 ) ÷ 102] x 100 = -15.69%
Formula
Percentage change = [(86 - 102) / 102] x 100
Subtract the new number by the original number
86 - 102 = -16
-16 ÷ 102 = -0.1568627450980392
-0.1568627450980392 x 100 = -15.69%