2458.33% is the change from 12 to 307
Calculation steps:
[( 307 - 12 ) ÷ 12] x 100 = 2458.33%
Formula
Percentage change = [(307 - 12) / 12] x 100
Subtract the new number by the original number
307 - 12 = 295
295 ÷ 12 = 24.583333333333332
24.583333333333332 x 100 = 2458.33%