-31.5% is the change from 127 to 87
Calculation steps:
[( 87 - 127 ) ÷ 127] x 100 = -31.5%
Formula
Percentage change = [(87 - 127) / 127] x 100
Subtract the new number by the original number
87 - 127 = -40
-40 ÷ 127 = -0.31496062992125984
-0.31496062992125984 x 100 = -31.5%