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Jacob had 7 hours of free time at the Boy Scout camp. He spent 2 ^{1}/_{3} hours canoeing and the rest of the time hiking. How many hours did Jacob spend on hiking?

Jori volunteered at the local soup kitchen for 6 hours on Saturday. She spent 2 ^{3}/_{4} hours serving food and the remaining hours stocking shelves and washing up. How many hours did she spend stocking shelves and washing up?