-36.5% is the change from 137 to 87
Calculation steps:
[( 87 - 137 ) ÷ 137] x 100 = -36.5%
Formula
Percentage change = [(87 - 137) / 137] x 100
Subtract the new number by the original number
87 - 137 = -50
-50 ÷ 137 = -0.36496350364963503
-0.36496350364963503 x 100 = -36.5%