400% is the change from 66 to 330
Calculation steps:
[( 330 - 66 ) ÷ 66] x 100 = 400%
Formula
Percentage change = [(330 - 66) / 66] x 100
Subtract the new number by the original number
330 - 66 = 264
264 ÷ 66 = 4
4 x 100 = 400%
Example