501.8% is the change from 111 to 668
Calculation steps:
[( 668 - 111 ) ÷ 111] x 100 = 501.8%
Formula
Percentage change = [(668 - 111) / 111] x 100
Subtract the new number by the original number
668 - 111 = 557
557 ÷ 111 = 5.018018018018018
5.018018018018018 x 100 = 501.8%