102.3% is the change from 217 to 439
Calculation steps:
[( 439 - 217 ) ÷ 217] x 100 = 102.3%
Formula
Percentage change = [(439 - 217) / 217] x 100
Subtract the new number by the original number
439 - 217 = 222
222 ÷ 217 = 1.023041474654378
1.023041474654378 x 100 = 102.3%