237.5% is the change from 80 to 270
Calculation steps:
[( 270 - 80 ) ÷ 80] x 100 = 237.5%
Formula
Percentage change = [(270 - 80) / 80] x 100
Subtract the new number by the original number
270 - 80 = 190
190 ÷ 80 = 2.375
2.375 x 100 = 237.5%
Example