748.48% is the change from 99 to 840
Calculation steps:
[( 840 - 99 ) ÷ 99] x 100 = 748.48%
Formula
Percentage change = [(840 - 99) / 99] x 100
Subtract the new number by the original number
840 - 99 = 741
741 ÷ 99 = 7.484848484848484
7.484848484848484 x 100 = 748.48%