910.61% is the change from 66 to 667
Calculation steps:
[( 667 - 66 ) ÷ 66] x 100 = 910.61%
Formula
Percentage change = [(667 - 66) / 66] x 100
Subtract the new number by the original number
667 - 66 = 601
601 ÷ 66 = 9.106060606060606
9.106060606060606 x 100 = 910.61%