-21.36% is the change from 501 to 394
Calculation steps:
[( 394 - 501 ) ÷ 501] x 100 = -21.36%
Formula
Percentage change = [(394 - 501) / 501] x 100
Subtract the new number by the original number
394 - 501 = -107
-107 ÷ 501 = -0.21357285429141717
-0.21357285429141717 x 100 = -21.36%