-44.6% is the change from 991 to 549
Calculation steps:
[( 549 - 991 ) ÷ 991] x 100 = -44.6%
Formula
Percentage change = [(549 - 991) / 991] x 100
Subtract the new number by the original number
549 - 991 = -442
-442 ÷ 991 = -0.44601412714429867
-0.44601412714429867 x 100 = -44.6%