31.34% is the change from 217 to 285
Calculation steps:
[( 285 - 217 ) ÷ 217] x 100 = 31.34%
Formula
Percentage change = [(285 - 217) / 217] x 100
Subtract the new number by the original number
285 - 217 = 68
68 ÷ 217 = 0.31336405529953915
0.31336405529953915 x 100 = 31.34%