66000% is the change from 1 to 661
Calculation steps:
[( 661 - 1 ) ÷ 1] x 100 = 66000%
Formula
Percentage change = [(661 - 1) / 1] x 100
Subtract the new number by the original number
661 - 1 = 660
660 ÷ 1 = 660
660 x 100 = 66000%
Example