-21.49% is the change from 549 to 431
Calculation steps:
[( 431 - 549 ) ÷ 549] x 100 = -21.49%
Formula
Percentage change = [(431 - 549) / 549] x 100
Subtract the new number by the original number
431 - 549 = -118
-118 ÷ 549 = -0.21493624772313297
-0.21493624772313297 x 100 = -21.49%