To clarify the math:

Bet = the bet size you're calling, pot = the pot when it's your turn to call.

Obviously you're calling $10.80. The pot when it's your turn to act on the end is the 4.55 that was in it going into the turn plus the 3.50 you put in with your bet and the 14.30 he put in with his raise for a total of $22.35.

So bet/(bet+pot) = 10.80/(10.80+22.35) = 0.3258 or 32.58%.