1526.32% is the change from 19 to 309
Calculation steps:
[( 309 - 19 ) ÷ 19] x 100 = 1526.32%
Formula
Percentage change = [(309 - 19) / 19] x 100
Subtract the new number by the original number
309 - 19 = 290
290 ÷ 19 = 15.263157894736842
15.263157894736842 x 100 = 1526.32%