-87.93% is the change from 721 to 87
Calculation steps:
[( 87 - 721 ) ÷ 721] x 100 = -87.93%
Formula
Percentage change = [(87 - 721) / 721] x 100
Subtract the new number by the original number
87 - 721 = -634
-634 ÷ 721 = -0.8793342579750347
-0.8793342579750347 x 100 = -87.93%