2300% is the change from 12 to 288
Calculation steps:
[( 288 - 12 ) ÷ 12] x 100 = 2300%
Formula
Percentage change = [(288 - 12) / 12] x 100
Subtract the new number by the original number
288 - 12 = 276
276 ÷ 12 = 23
23 x 100 = 2300%
Example