454.55% is the change from 121 to 671
Calculation steps:
[( 671 - 121 ) ÷ 121] x 100 = 454.55%
Formula
Percentage change = [(671 - 121) / 121] x 100
Subtract the new number by the original number
671 - 121 = 550
550 ÷ 121 = 4.545454545454546
4.545454545454546 x 100 = 454.55%