1321.05% is the change from 19 to 270
Calculation steps:
[( 270 - 19 ) ÷ 19] x 100 = 1321.05%
Formula
Percentage change = [(270 - 19) / 19] x 100
Subtract the new number by the original number
270 - 19 = 251
251 ÷ 19 = 13.210526315789474
13.210526315789474 x 100 = 1321.05%