-38.18% is the change from 812 to 502
Calculation steps:
[( 502 - 812 ) ÷ 812] x 100 = -38.18%
Formula
Percentage change = [(502 - 812) / 812] x 100
Subtract the new number by the original number
502 - 812 = -310
-310 ÷ 812 = -0.3817733990147783
-0.3817733990147783 x 100 = -38.18%