Aleena has a 1-gallon watering can that is full of water. She uses 3/8 gallon to water her roses and 1/3 to water her geraniums. How much water did Aleena use to water both her plants?

Does Aleena use more 1/2 gallon or less than 1/2 gallon of water?

How do you know?

THIS IS A BIG GRADE PLEASE DO NOT GET IT WRONG!