580.3% is the change from 66 to 449
Calculation steps:
[( 449 - 66 ) ÷ 66] x 100 = 580.3%
Formula
Percentage change = [(449 - 66) / 66] x 100
Subtract the new number by the original number
449 - 66 = 383
383 ÷ 66 = 5.803030303030303
5.803030303030303 x 100 = 580.3%