15.21% is the change from 217 to 250
Calculation steps:
[( 250 - 217 ) ÷ 217] x 100 = 15.21%
Formula
Percentage change = [(250 - 217) / 217] x 100
Subtract the new number by the original number
250 - 217 = 33
33 ÷ 217 = 0.15207373271889402
0.15207373271889402 x 100 = 15.21%