-87.87% is the change from 503 to 61
Calculation steps:
[( 61 - 503 ) ÷ 503] x 100 = -87.87%
Formula
Percentage change = [(61 - 503) / 503] x 100
Subtract the new number by the original number
61 - 503 = -442
-442 ÷ 503 = -0.878727634194831
-0.878727634194831 x 100 = -87.87%