777.78% is the change from 99 to 869
Calculation steps:
[( 869 - 99 ) ÷ 99] x 100 = 777.78%
Formula
Percentage change = [(869 - 99) / 99] x 100
Subtract the new number by the original number
869 - 99 = 770
770 ÷ 99 = 7.777777777777778
7.777777777777778 x 100 = 777.78%