-82.7% is the change from 503 to 87
Calculation steps:
[( 87 - 503 ) ÷ 503] x 100 = -82.7%
Formula
Percentage change = [(87 - 503) / 503] x 100
Subtract the new number by the original number
87 - 503 = -416
-416 ÷ 503 = -0.827037773359841
-0.827037773359841 x 100 = -82.7%