39.17% is the change from 217 to 302
Calculation steps:
[( 302 - 217 ) ÷ 217] x 100 = 39.17%
Formula
Percentage change = [(302 - 217) / 217] x 100
Subtract the new number by the original number
302 - 217 = 85
85 ÷ 217 = 0.391705069124424
0.391705069124424 x 100 = 39.17%