2483.33% is the change from 12 to 310
Calculation steps:
[( 310 - 12 ) ÷ 12] x 100 = 2483.33%
Formula
Percentage change = [(310 - 12) / 12] x 100
Subtract the new number by the original number
310 - 12 = 298
298 ÷ 12 = 24.833333333333332
24.833333333333332 x 100 = 2483.33%