11.79% is the change from 280 to 313
Calculation steps:
[( 313 - 280 ) ÷ 280] x 100 = 11.79%
Formula
Percentage change = [(313 - 280) / 280] x 100
Subtract the new number by the original number
313 - 280 = 33
33 ÷ 280 = 0.11785714285714285
0.11785714285714285 x 100 = 11.79%