EASY FOR PEOPLE THAT KNOW HOW TO DO MATH, HELP NEEDED

Answer:
1 and 5/24 gallon left
Step-by-step explanation:
https://www.slader.com/discussion/question/mark-wants-to-paint-a-mural-he-has-113-gallons-of-yellow-paint-114-gallons-of-green-paint-and-78-g-2/
its a reliable link