-2.73% is the change from 549 to 534
Calculation steps:
[( 534 - 549 ) ÷ 549] x 100 = -2.73%
Formula
Percentage change = [(534 - 549) / 549] x 100
Subtract the new number by the original number
534 - 549 = -15
-15 ÷ 549 = -0.0273224043715847
-0.0273224043715847 x 100 = -2.73%