-14.23% is the change from 991 to 850
Calculation steps:
[( 850 - 991 ) ÷ 991] x 100 = -14.23%
Formula
Percentage change = [(850 - 991) / 991] x 100
Subtract the new number by the original number
850 - 991 = -141
-141 ÷ 991 = -0.14228052472250252
-0.14228052472250252 x 100 = -14.23%