577.78% is the change from 99 to 671
Calculation steps:
[( 671 - 99 ) ÷ 99] x 100 = 577.78%
Formula
Percentage change = [(671 - 99) / 99] x 100
Subtract the new number by the original number
671 - 99 = 572
572 ÷ 99 = 5.777777777777778
5.777777777777778 x 100 = 577.78%