576.77% is the change from 99 to 670
Calculation steps:
[( 670 - 99 ) ÷ 99] x 100 = 576.77%
Formula
Percentage change = [(670 - 99) / 99] x 100
Subtract the new number by the original number
670 - 99 = 571
571 ÷ 99 = 5.767676767676767
5.767676767676767 x 100 = 576.77%