-71.04% is the change from 549 to 159
Calculation steps:
[( 159 - 549 ) ÷ 549] x 100 = -71.04%
Formula
Percentage change = [(159 - 549) / 549] x 100
Subtract the new number by the original number
159 - 549 = -390
-390 ÷ 549 = -0.7103825136612022
-0.7103825136612022 x 100 = -71.04%