-41.57% is the change from 991 to 579
Calculation steps:
[( 579 - 991 ) ÷ 991] x 100 = -41.57%
Formula
Percentage change = [(579 - 991) / 991] x 100
Subtract the new number by the original number
579 - 991 = -412
-412 ÷ 991 = -0.4157416750756811
-0.4157416750756811 x 100 = -41.57%