44.5% is the change from 218 to 315
Calculation steps:
[( 315 - 218 ) ÷ 218] x 100 = 44.5%
Formula
Percentage change = [(315 - 218) / 218] x 100
Subtract the new number by the original number
315 - 218 = 97
97 ÷ 218 = 0.44495412844036697
0.44495412844036697 x 100 = 44.5%