1500% is the change from 19 to 304
Calculation steps:
[( 304 - 19 ) ÷ 19] x 100 = 1500%
Formula
Percentage change = [(304 - 19) / 19] x 100
Subtract the new number by the original number
304 - 19 = 285
285 ÷ 19 = 15
15 x 100 = 1500%
Example