1521.05% is the change from 19 to 308
Calculation steps:
[( 308 - 19 ) ÷ 19] x 100 = 1521.05%
Formula
Percentage change = [(308 - 19) / 19] x 100
Subtract the new number by the original number
308 - 19 = 289
289 ÷ 19 = 15.210526315789474
15.210526315789474 x 100 = 1521.05%