340% is the change from 80 to 352
Calculation steps:
[( 352 - 80 ) ÷ 80] x 100 = 340%
Formula
Percentage change = [(352 - 80) / 80] x 100
Subtract the new number by the original number
352 - 80 = 272
272 ÷ 80 = 3.4
3.4 x 100 = 340%
Example