-41.71% is the change from 549 to 320
Calculation steps:
[( 320 - 549 ) ÷ 549] x 100 = -41.71%
Formula
Percentage change = [(320 - 549) / 549] x 100
Subtract the new number by the original number
320 - 549 = -229
-229 ÷ 549 = -0.41712204007285975
-0.41712204007285975 x 100 = -41.71%