-17.85% is the change from 549 to 451
Calculation steps:
[( 451 - 549 ) ÷ 549] x 100 = -17.85%
Formula
Percentage change = [(451 - 549) / 549] x 100
Subtract the new number by the original number
451 - 549 = -98
-98 ÷ 549 = -0.1785063752276867
-0.1785063752276867 x 100 = -17.85%