-43.59% is the change from 991 to 559
Calculation steps:
[( 559 - 991 ) ÷ 991] x 100 = -43.59%
Formula
Percentage change = [(559 - 991) / 991] x 100
Subtract the new number by the original number
559 - 991 = -432
-432 ÷ 991 = -0.43592330978809285
-0.43592330978809285 x 100 = -43.59%