50.9% is the change from 609 to 919
Calculation steps:
[( 919 - 609 ) ÷ 609] x 100 = 50.9%
Formula
Percentage change = [(919 - 609) / 609] x 100
Subtract the new number by the original number
919 - 609 = 310
310 ÷ 609 = 0.5090311986863711
0.5090311986863711 x 100 = 50.9%