-32.03% is the change from 128 to 87
Calculation steps:
[( 87 - 128 ) ÷ 128] x 100 = -32.03%
Formula
Percentage change = [(87 - 128) / 128] x 100
Subtract the new number by the original number
87 - 128 = -41
-41 ÷ 128 = -0.3203125
-0.3203125 x 100 = -32.03%