6340% is the change from 10 to 644
Calculation steps:
[( 644 - 10 ) ÷ 10] x 100 = 6340%
Formula
Percentage change = [(644 - 10) / 10] x 100
Subtract the new number by the original number
644 - 10 = 634
634 ÷ 10 = 63.4
63.4 x 100 = 6340%
Example