-39.96% is the change from 503 to 302
Calculation steps:
[( 302 - 503 ) ÷ 503] x 100 = -39.96%
Formula
Percentage change = [(302 - 503) / 503] x 100
Subtract the new number by the original number
302 - 503 = -201
-201 ÷ 503 = -0.3996023856858847
-0.3996023856858847 x 100 = -39.96%