913.64% is the change from 66 to 669
Calculation steps:
[( 669 - 66 ) ÷ 66] x 100 = 913.64%
Formula
Percentage change = [(669 - 66) / 66] x 100
Subtract the new number by the original number
669 - 66 = 603
603 ÷ 66 = 9.136363636363637
9.136363636363637 x 100 = 913.64%