-79.52% is the change from 503 to 103
Calculation steps:
[( 103 - 503 ) ÷ 503] x 100 = -79.52%
Formula
Percentage change = [(103 - 503) / 503] x 100
Subtract the new number by the original number
103 - 503 = -400
-400 ÷ 503 = -0.7952286282306164
-0.7952286282306164 x 100 = -79.52%