-22.95% is the change from 549 to 423
Calculation steps:
[( 423 - 549 ) ÷ 549] x 100 = -22.95%
Formula
Percentage change = [(423 - 549) / 549] x 100
Subtract the new number by the original number
423 - 549 = -126
-126 ÷ 549 = -0.22950819672131148
-0.22950819672131148 x 100 = -22.95%