291.25% is the change from 80 to 313
Calculation steps:
[( 313 - 80 ) ÷ 80] x 100 = 291.25%
Formula
Percentage change = [(313 - 80) / 80] x 100
Subtract the new number by the original number
313 - 80 = 233
233 ÷ 80 = 2.9125
2.9125 x 100 = 291.25%
Example