321.05% is the change from 19 to 80
Calculation steps:
[( 80 - 19 ) ÷ 19] x 100 = 321.05%
Formula
Percentage change = [(80 - 19) / 19] x 100
Subtract the new number by the original number
80 - 19 = 61
61 ÷ 19 = 3.210526315789474
3.210526315789474 x 100 = 321.05%