55.36% is the change from 392 to 609
Calculation steps:
[( 609 - 392 ) ÷ 392] x 100 = 55.36%
Formula
Percentage change = [(609 - 392) / 392] x 100
Subtract the new number by the original number
609 - 392 = 217
217 ÷ 392 = 0.5535714285714286
0.5535714285714286 x 100 = 55.36%