747.47% is the change from 99 to 839
Calculation steps:
[( 839 - 99 ) ÷ 99] x 100 = 747.47%
Formula
Percentage change = [(839 - 99) / 99] x 100
Subtract the new number by the original number
839 - 99 = 740
740 ÷ 99 = 7.474747474747475
7.474747474747475 x 100 = 747.47%