390.91% is the change from 66 to 324
Calculation steps:
[( 324 - 66 ) ÷ 66] x 100 = 390.91%
Formula
Percentage change = [(324 - 66) / 66] x 100
Subtract the new number by the original number
324 - 66 = 258
258 ÷ 66 = 3.909090909090909
3.909090909090909 x 100 = 390.91%