-21.09% is the change from 991 to 782
Calculation steps:
[( 782 - 991 ) ÷ 991] x 100 = -21.09%
Formula
Percentage change = [(782 - 991) / 991] x 100
Subtract the new number by the original number
782 - 991 = -209
-209 ÷ 991 = -0.21089808274470231
-0.21089808274470231 x 100 = -21.09%