-93.84% is the change from 503 to 31
Calculation steps:
[( 31 - 503 ) ÷ 503] x 100 = -93.84%
Formula
Percentage change = [(31 - 503) / 503] x 100
Subtract the new number by the original number
31 - 503 = -472
-472 ÷ 503 = -0.9383697813121272
-0.9383697813121272 x 100 = -93.84%