-7.06% is the change from 850 to 790
Calculation steps:
[( 790 - 850 ) ÷ 850] x 100 = -7.06%
Formula
Percentage change = [(790 - 850) / 850] x 100
Subtract the new number by the original number
790 - 850 = -60
-60 ÷ 850 = -0.07058823529411765
-0.07058823529411765 x 100 = -7.06%