172.4% is the change from 308 to 839
Calculation steps:
[( 839 - 308 ) ÷ 308] x 100 = 172.4%
Formula
Percentage change = [(839 - 308) / 308] x 100
Subtract the new number by the original number
839 - 308 = 531
531 ÷ 308 = 1.724025974025974
1.724025974025974 x 100 = 172.4%