-20.59% is the change from 991 to 787
Calculation steps:
[( 787 - 991 ) ÷ 991] x 100 = -20.59%
Formula
Percentage change = [(787 - 991) / 991] x 100
Subtract the new number by the original number
787 - 991 = -204
-204 ÷ 991 = -0.2058526740665994
-0.2058526740665994 x 100 = -20.59%