344.44% is the change from 18 to 80
Calculation steps:
[( 80 - 18 ) ÷ 18] x 100 = 344.44%
Formula
Percentage change = [(80 - 18) / 18] x 100
Subtract the new number by the original number
80 - 18 = 62
62 ÷ 18 = 3.4444444444444446
3.4444444444444446 x 100 = 344.44%