-42.89% is the change from 991 to 566
Calculation steps:
[( 566 - 991 ) ÷ 991] x 100 = -42.89%
Formula
Percentage change = [(566 - 991) / 991] x 100
Subtract the new number by the original number
566 - 991 = -425
-425 ÷ 991 = -0.42885973763874874
-0.42885973763874874 x 100 = -42.89%