172.08% is the change from 308 to 838
Calculation steps:
[( 838 - 308 ) ÷ 308] x 100 = 172.08%
Formula
Percentage change = [(838 - 308) / 308] x 100
Subtract the new number by the original number
838 - 308 = 530
530 ÷ 308 = 1.7207792207792207
1.7207792207792207 x 100 = 172.08%