769.7% is the change from 99 to 861
Calculation steps:
[( 861 - 99 ) ÷ 99] x 100 = 769.7%
Formula
Percentage change = [(861 - 99) / 99] x 100
Subtract the new number by the original number
861 - 99 = 762
762 ÷ 99 = 7.696969696969697
7.696969696969697 x 100 = 769.7%