-53.88% is the change from 991 to 457
Calculation steps:
[( 457 - 991 ) ÷ 991] x 100 = -53.88%
Formula
Percentage change = [(457 - 991) / 991] x 100
Subtract the new number by the original number
457 - 991 = -534
-534 ÷ 991 = -0.5388496468213926
-0.5388496468213926 x 100 = -53.88%