-22% is the change from 991 to 773
Calculation steps:
[( 773 - 991 ) ÷ 991] x 100 = -22%
Formula
Percentage change = [(773 - 991) / 991] x 100
Subtract the new number by the original number
773 - 991 = -218
-218 ÷ 991 = -0.2199798183652876
-0.2199798183652876 x 100 = -22%