6590% is the change from 10 to 669
Calculation steps:
[( 669 - 10 ) ÷ 10] x 100 = 6590%
Formula
Percentage change = [(669 - 10) / 10] x 100
Subtract the new number by the original number
669 - 10 = 659
659 ÷ 10 = 65.9
65.9 x 100 = 6590%
Example