-40.38% is the change from 842 to 502
Calculation steps:
[( 502 - 842 ) ÷ 842] x 100 = -40.38%
Formula
Percentage change = [(502 - 842) / 842] x 100
Subtract the new number by the original number
502 - 842 = -340
-340 ÷ 842 = -0.40380047505938244
-0.40380047505938244 x 100 = -40.38%