-41.53% is the change from 939 to 549
Calculation steps:
[( 549 - 939 ) ÷ 939] x 100 = -41.53%
Formula
Percentage change = [(549 - 939) / 939] x 100
Subtract the new number by the original number
549 - 939 = -390
-390 ÷ 939 = -0.41533546325878595
-0.41533546325878595 x 100 = -41.53%