47.47% is the change from 217 to 320
Calculation steps:
[( 320 - 217 ) ÷ 217] x 100 = 47.47%
Formula
Percentage change = [(320 - 217) / 217] x 100
Subtract the new number by the original number
320 - 217 = 103
103 ÷ 217 = 0.47465437788018433
0.47465437788018433 x 100 = 47.47%