-82.84% is the change from 507 to 87
Calculation steps:
[( 87 - 507 ) ÷ 507] x 100 = -82.84%
Formula
Percentage change = [(87 - 507) / 507] x 100
Subtract the new number by the original number
87 - 507 = -420
-420 ÷ 507 = -0.8284023668639053
-0.8284023668639053 x 100 = -82.84%