-20.95% is the change from 549 to 434
Calculation steps:
[( 434 - 549 ) ÷ 549] x 100 = -20.95%
Formula
Percentage change = [(434 - 549) / 549] x 100
Subtract the new number by the original number
434 - 549 = -115
-115 ÷ 549 = -0.20947176684881602
-0.20947176684881602 x 100 = -20.95%