You peel 2 oranges every 4 hours; This is your rate. Peeling 2 oranges every 4 hours is the same as peeling 1 orange every 2 hours, which is the same as peeling 5 oranges every 10 hours, and so on. The important thing is, you are peeling HALF the amount of oranges as the amount of hours go by. So, if you’re peeling for 12hours (and we now that kiara peels half as many orange as the amount of hours that pass) this means she peels 6 oranges (since 12 multiplied by 1/2 is 6)