-74.87% is the change from 991 to 249
Calculation steps:
[( 249 - 991 ) ÷ 991] x 100 = -74.87%
Formula
Percentage change = [(249 - 991) / 991] x 100
Subtract the new number by the original number
249 - 991 = -742
-742 ÷ 991 = -0.7487386478304743
-0.7487386478304743 x 100 = -74.87%