40.09% is the change from 217 to 304
Calculation steps:
[( 304 - 217 ) ÷ 217] x 100 = 40.09%
Formula
Percentage change = [(304 - 217) / 217] x 100
Subtract the new number by the original number
304 - 217 = 87
87 ÷ 217 = 0.4009216589861751
0.4009216589861751 x 100 = 40.09%