-40.06% is the change from 991 to 594
Calculation steps:
[( 594 - 991 ) ÷ 991] x 100 = -40.06%
Formula
Percentage change = [(594 - 991) / 991] x 100
Subtract the new number by the original number
594 - 991 = -397
-397 ÷ 991 = -0.40060544904137235
-0.40060544904137235 x 100 = -40.06%