243.75% is the change from 80 to 275
Calculation steps:
[( 275 - 80 ) ÷ 80] x 100 = 243.75%
Formula
Percentage change = [(275 - 80) / 80] x 100
Subtract the new number by the original number
275 - 80 = 195
195 ÷ 80 = 2.4375
2.4375 x 100 = 243.75%
Example