1800% is the change from 12 to 228
Calculation steps:
[( 228 - 12 ) ÷ 12] x 100 = 1800%
Formula
Percentage change = [(228 - 12) / 12] x 100
Subtract the new number by the original number
228 - 12 = 216
216 ÷ 12 = 18
18 x 100 = 1800%
Example