2425% is the change from 12 to 303
Calculation steps:
[( 303 - 12 ) ÷ 12] x 100 = 2425%
Formula
Percentage change = [(303 - 12) / 12] x 100
Subtract the new number by the original number
303 - 12 = 291
291 ÷ 12 = 24.25
24.25 x 100 = 2425%
Example