678.79% is the change from 99 to 771
Calculation steps:
[( 771 - 99 ) ÷ 99] x 100 = 678.79%
Formula
Percentage change = [(771 - 99) / 99] x 100
Subtract the new number by the original number
771 - 99 = 672
672 ÷ 99 = 6.787878787878788
6.787878787878788 x 100 = 678.79%