6550% is the change from 10 to 665
Calculation steps:
[( 665 - 10 ) ÷ 10] x 100 = 6550%
Formula
Percentage change = [(665 - 10) / 10] x 100
Subtract the new number by the original number
665 - 10 = 655
655 ÷ 10 = 65.5
65.5 x 100 = 6550%
Example