18.78% is the change from 181 to 215
Calculation steps:
[( 215 - 181 ) ÷ 181] x 100 = 18.78%
Formula
Percentage change = [(215 - 181) / 181] x 100
Subtract the new number by the original number
215 - 181 = 34
34 ÷ 181 = 0.1878453038674033
0.1878453038674033 x 100 = 18.78%