15/40 in lowest term i need it so bad now

Ahomeowner plans to hang wallpaper on one wall of a bedroom that is 10 feet long if a stripe of wallpaper is 20 inches wide and stripes or hung vertically how many stripes on wall paper with the homeowner required

How do i simply this radical expression?

On ryan's last social studies test there were two types of questions true/false worth 3 points each and multiple choice questions worth 4 points each