-92.71% is the change from 549 to 40
Calculation steps:
[( 40 - 549 ) ÷ 549] x 100 = -92.71%
Formula
Percentage change = [(40 - 549) / 549] x 100
Subtract the new number by the original number
40 - 549 = -509
-509 ÷ 549 = -0.9271402550091075
-0.9271402550091075 x 100 = -92.71%