97.24% is the change from 217 to 428
Calculation steps:
[( 428 - 217 ) ÷ 217] x 100 = 97.24%
Formula
Percentage change = [(428 - 217) / 217] x 100
Subtract the new number by the original number
428 - 217 = 211
211 ÷ 217 = 0.9723502304147466
0.9723502304147466 x 100 = 97.24%