7.8% is the change from 218 to 235
Calculation steps:
[( 235 - 218 ) ÷ 218] x 100 = 7.8%
Formula
Percentage change = [(235 - 218) / 218] x 100
Subtract the new number by the original number
235 - 218 = 17
17 ÷ 218 = 0.0779816513761468
0.0779816513761468 x 100 = 7.8%