350% is the change from 80 to 360
Calculation steps:
[( 360 - 80 ) ÷ 80] x 100 = 350%
Formula
Percentage change = [(360 - 80) / 80] x 100
Subtract the new number by the original number
360 - 80 = 280
280 ÷ 80 = 3.5
3.5 x 100 = 350%
Example