557.58% is the change from 66 to 434
Calculation steps:
[( 434 - 66 ) ÷ 66] x 100 = 557.58%
Formula
Percentage change = [(434 - 66) / 66] x 100
Subtract the new number by the original number
434 - 66 = 368
368 ÷ 66 = 5.575757575757576
5.575757575757576 x 100 = 557.58%