-23.84% is the change from 646 to 492
Calculation steps:
[( 492 - 646 ) ÷ 646] x 100 = -23.84%
Formula
Percentage change = [(492 - 646) / 646] x 100
Subtract the new number by the original number
492 - 646 = -154
-154 ÷ 646 = -0.23839009287925697
-0.23839009287925697 x 100 = -23.84%