-7.65% is the change from 549 to 507
Calculation steps:
[( 507 - 549 ) ÷ 549] x 100 = -7.65%
Formula
Percentage change = [(507 - 549) / 549] x 100
Subtract the new number by the original number
507 - 549 = -42
-42 ÷ 549 = -0.07650273224043716
-0.07650273224043716 x 100 = -7.65%