49.59% is the change from 609 to 911
Calculation steps:
[( 911 - 609 ) ÷ 609] x 100 = 49.59%
Formula
Percentage change = [(911 - 609) / 609] x 100
Subtract the new number by the original number
911 - 609 = 302
302 ÷ 609 = 0.49589490968801314
0.49589490968801314 x 100 = 49.59%