-8.5% is the change from 929 to 850
Calculation steps:
[( 850 - 929 ) ÷ 929] x 100 = -8.5%
Formula
Percentage change = [(850 - 929) / 929] x 100
Subtract the new number by the original number
850 - 929 = -79
-79 ÷ 929 = -0.08503767491926803
-0.08503767491926803 x 100 = -8.5%