-20.89% is the change from 991 to 784
Calculation steps:
[( 784 - 991 ) ÷ 991] x 100 = -20.89%
Formula
Percentage change = [(784 - 991) / 991] x 100
Subtract the new number by the original number
784 - 991 = -207
-207 ÷ 991 = -0.20887991927346114
-0.20887991927346114 x 100 = -20.89%