6390% is the change from 10 to 649
Calculation steps:
[( 649 - 10 ) ÷ 10] x 100 = 6390%
Formula
Percentage change = [(649 - 10) / 10] x 100
Subtract the new number by the original number
649 - 10 = 639
639 ÷ 10 = 63.9
63.9 x 100 = 6390%
Example