-21.19% is the change from 623 to 491
Calculation steps:
[( 491 - 623 ) ÷ 623] x 100 = -21.19%
Formula
Percentage change = [(491 - 623) / 623] x 100
Subtract the new number by the original number
491 - 623 = -132
-132 ÷ 623 = -0.21187800963081863
-0.21187800963081863 x 100 = -21.19%