122.4% is the change from 308 to 685
Calculation steps:
[( 685 - 308 ) ÷ 308] x 100 = 122.4%
Formula
Percentage change = [(685 - 308) / 308] x 100
Subtract the new number by the original number
685 - 308 = 377
377 ÷ 308 = 1.224025974025974
1.224025974025974 x 100 = 122.4%