You are given an amount and a percentage of change. Determine the resulting amount.

$313.49 changed by 14.5%

Find 10% of 313.49 by 10 to get $31.35. take that and dived it by 4.5 and add it to the original 10% so you get 6.97 + 31.35 which equals $38.32. Given your wording, you should get $351.81. (38.32+313.35)