-82.5% is the change from 503 to 88
Calculation steps:
[( 88 - 503 ) ÷ 503] x 100 = -82.5%
Formula
Percentage change = [(88 - 503) / 503] x 100
Subtract the new number by the original number
88 - 503 = -415
-415 ÷ 503 = -0.8250497017892644
-0.8250497017892644 x 100 = -82.5%