406.06% is the change from 66 to 334
Calculation steps:
[( 334 - 66 ) ÷ 66] x 100 = 406.06%
Formula
Percentage change = [(334 - 66) / 66] x 100
Subtract the new number by the original number
334 - 66 = 268
268 ÷ 66 = 4.0606060606060606
4.0606060606060606 x 100 = 406.06%