430.3% is the change from 66 to 350
Calculation steps:
[( 350 - 66 ) ÷ 66] x 100 = 430.3%
Formula
Percentage change = [(350 - 66) / 66] x 100
Subtract the new number by the original number
350 - 66 = 284
284 ÷ 66 = 4.303030303030303
4.303030303030303 x 100 = 430.3%