3426.32% is the change from 19 to 670
Calculation steps:
[( 670 - 19 ) ÷ 19] x 100 = 3426.32%
Formula
Percentage change = [(670 - 19) / 19] x 100
Subtract the new number by the original number
670 - 19 = 651
651 ÷ 19 = 34.26315789473684
34.26315789473684 x 100 = 3426.32%