40.37% is the change from 218 to 306
Calculation steps:
[( 306 - 218 ) ÷ 218] x 100 = 40.37%
Formula
Percentage change = [(306 - 218) / 218] x 100
Subtract the new number by the original number
306 - 218 = 88
88 ÷ 218 = 0.4036697247706422
0.4036697247706422 x 100 = 40.37%