65900% is the change from 1 to 660
Calculation steps:
[( 660 - 1 ) ÷ 1] x 100 = 65900%
Formula
Percentage change = [(660 - 1) / 1] x 100
Subtract the new number by the original number
660 - 1 = 659
659 ÷ 1 = 659
659 x 100 = 65900%
Example