-22.91% is the change from 991 to 764
Calculation steps:
[( 764 - 991 ) ÷ 991] x 100 = -22.91%
Formula
Percentage change = [(764 - 991) / 991] x 100
Subtract the new number by the original number
764 - 991 = -227
-227 ÷ 991 = -0.22906155398587286
-0.22906155398587286 x 100 = -22.91%