-94.25% is the change from 991 to 57
Calculation steps:
[( 57 - 991 ) ÷ 991] x 100 = -94.25%
Formula
Percentage change = [(57 - 991) / 991] x 100
Subtract the new number by the original number
57 - 991 = -934
-934 ÷ 991 = -0.9424823410696267
-0.9424823410696267 x 100 = -94.25%