-97.7% is the change from 87 to 2
Calculation steps:
[( 2 - 87 ) ÷ 87] x 100 = -97.7%
Formula
Percentage change = [(2 - 87) / 87] x 100
Subtract the new number by the original number
2 - 87 = -85
-85 ÷ 87 = -0.9770114942528736
-0.9770114942528736 x 100 = -97.7%