685.86% is the change from 99 to 778
Calculation steps:
[( 778 - 99 ) ÷ 99] x 100 = 685.86%
Formula
Percentage change = [(778 - 99) / 99] x 100
Subtract the new number by the original number
778 - 99 = 679
679 ÷ 99 = 6.858585858585859
6.858585858585859 x 100 = 685.86%