183.33% is the change from 12 to 34
Calculation steps:
[( 34 - 12 ) ÷ 12] x 100 = 183.33%
Formula
Percentage change = [(34 - 12) / 12] x 100
Subtract the new number by the original number
34 - 12 = 22
22 ÷ 12 = 1.8333333333333333
1.8333333333333333 x 100 = 183.33%