989.74% is the change from 78 to 850
Calculation steps:
[( 850 - 78 ) ÷ 78] x 100 = 989.74%
Formula
Percentage change = [(850 - 78) / 78] x 100
Subtract the new number by the original number
850 - 78 = 772
772 ÷ 78 = 9.897435897435898
9.897435897435898 x 100 = 989.74%