412.12% is the change from 66 to 338
Calculation steps:
[( 338 - 66 ) ÷ 66] x 100 = 412.12%
Formula
Percentage change = [(338 - 66) / 66] x 100
Subtract the new number by the original number
338 - 66 = 272
272 ÷ 66 = 4.121212121212121
4.121212121212121 x 100 = 412.12%