-14.74% is the change from 997 to 850
Calculation steps:
[( 850 - 997 ) ÷ 997] x 100 = -14.74%
Formula
Percentage change = [(850 - 997) / 997] x 100
Subtract the new number by the original number
850 - 997 = -147
-147 ÷ 997 = -0.14744232698094284
-0.14744232698094284 x 100 = -14.74%