-38.93% is the change from 822 to 502
Calculation steps:
[( 502 - 822 ) ÷ 822] x 100 = -38.93%
Formula
Percentage change = [(502 - 822) / 822] x 100
Subtract the new number by the original number
502 - 822 = -320
-320 ÷ 822 = -0.38929440389294406
-0.38929440389294406 x 100 = -38.93%