844.44% is the change from 9 to 85
Calculation steps:
[( 85 - 9 ) ÷ 9] x 100 = 844.44%
Formula
Percentage change = [(85 - 9) / 9] x 100
Subtract the new number by the original number
85 - 9 = 76
76 ÷ 9 = 8.444444444444445
8.444444444444445 x 100 = 844.44%