21900% is the change from 3 to 660
Calculation steps:
[( 660 - 3 ) ÷ 3] x 100 = 21900%
Formula
Percentage change = [(660 - 3) / 3] x 100
Subtract the new number by the original number
660 - 3 = 657
657 ÷ 3 = 219
219 x 100 = 21900%
Example