99.67% is the change from 305 to 609
Calculation steps:
[( 609 - 305 ) ÷ 305] x 100 = 99.67%
Formula
Percentage change = [(609 - 305) / 305] x 100
Subtract the new number by the original number
609 - 305 = 304
304 ÷ 305 = 0.9967213114754099
0.9967213114754099 x 100 = 99.67%