-73.59% is the change from 549 to 145
Calculation steps:
[( 145 - 549 ) ÷ 549] x 100 = -73.59%
Formula
Percentage change = [(145 - 549) / 549] x 100
Subtract the new number by the original number
145 - 549 = -404
-404 ÷ 549 = -0.7358834244080146
-0.7358834244080146 x 100 = -73.59%