523.64% is the change from 55 to 343
Calculation steps:
[( 343 - 55 ) ÷ 55] x 100 = 523.64%
Formula
Percentage change = [(343 - 55) / 55] x 100
Subtract the new number by the original number
343 - 55 = 288
288 ÷ 55 = 5.236363636363636
5.236363636363636 x 100 = 523.64%