6500% is the change from 10 to 660
Calculation steps:
[( 660 - 10 ) ÷ 10] x 100 = 6500%
Formula
Percentage change = [(660 - 10) / 10] x 100
Subtract the new number by the original number
660 - 10 = 650
650 ÷ 10 = 65
65 x 100 = 6500%
Example