15.67% is the change from 217 to 251
Calculation steps:
[( 251 - 217 ) ÷ 217] x 100 = 15.67%
Formula
Percentage change = [(251 - 217) / 217] x 100
Subtract the new number by the original number
251 - 217 = 34
34 ÷ 217 = 0.15668202764976957
0.15668202764976957 x 100 = 15.67%