43.75% is the change from 80 to 115
Calculation steps:
[( 115 - 80 ) ÷ 80] x 100 = 43.75%
Formula
Percentage change = [(115 - 80) / 80] x 100
Subtract the new number by the original number
115 - 80 = 35
35 ÷ 80 = 0.4375
0.4375 x 100 = 43.75%
Example