PLEASE HELP IM REALLY BAD AT MATH

Royston’s car had 15 1/5 gallons of gas at the start of the trip. During the trip, he stopped at a gas station and refueled the car with 5 3/5 gallons. If the car consumed 17 4/5 gallons of gas during the trip, there are still___gallons of gas remaining in the tank.

(Fill in the blank that looks like this ___)

PLEASE HELP IM REALLY BAD AT MATHRoystons car had 15 15 gallons of gas at the start of the trip During the trip he stopped at a gas station and refueled the car class=