424.24% is the change from 66 to 346
Calculation steps:
[( 346 - 66 ) ÷ 66] x 100 = 424.24%
Formula
Percentage change = [(346 - 66) / 66] x 100
Subtract the new number by the original number
346 - 66 = 280
280 ÷ 66 = 4.242424242424242
4.242424242424242 x 100 = 424.24%