-37.64% is the change from 991 to 618
Calculation steps:
[( 618 - 991 ) ÷ 991] x 100 = -37.64%
Formula
Percentage change = [(618 - 991) / 991] x 100
Subtract the new number by the original number
618 - 991 = -373
-373 ÷ 991 = -0.3763874873864783
-0.3763874873864783 x 100 = -37.64%