325% is the change from 80 to 340
Calculation steps:
[( 340 - 80 ) ÷ 80] x 100 = 325%
Formula
Percentage change = [(340 - 80) / 80] x 100
Subtract the new number by the original number
340 - 80 = 260
260 ÷ 80 = 3.25
3.25 x 100 = 325%
Example