-27.25% is the change from 991 to 721
Calculation steps:
[( 721 - 991 ) ÷ 991] x 100 = -27.25%
Formula
Percentage change = [(721 - 991) / 991] x 100
Subtract the new number by the original number
721 - 991 = -270
-270 ÷ 991 = -0.272452068617558
-0.272452068617558 x 100 = -27.25%