30% is the change from 180 to 234
Calculation steps:
[( 234 - 180 ) ÷ 180] x 100 = 30%
Formula
Percentage change = [(234 - 180) / 180] x 100
Subtract the new number by the original number
234 - 180 = 54
54 ÷ 180 = 0.3
0.3 x 100 = 30%
Example