513.64% is the change from 66 to 405
Calculation steps:
[( 405 - 66 ) ÷ 66] x 100 = 513.64%
Formula
Percentage change = [(405 - 66) / 66] x 100
Subtract the new number by the original number
405 - 66 = 339
339 ÷ 66 = 5.136363636363637
5.136363636363637 x 100 = 513.64%