548.48% is the change from 99 to 642
Calculation steps:
[( 642 - 99 ) ÷ 99] x 100 = 548.48%
Formula
Percentage change = [(642 - 99) / 99] x 100
Subtract the new number by the original number
642 - 99 = 543
543 ÷ 99 = 5.484848484848484
5.484848484848484 x 100 = 548.48%