669.09% is the change from 55 to 423
Calculation steps:
[( 423 - 55 ) ÷ 55] x 100 = 669.09%
Formula
Percentage change = [(423 - 55) / 55] x 100
Subtract the new number by the original number
423 - 55 = 368
368 ÷ 55 = 6.6909090909090905
6.6909090909090905 x 100 = 669.09%