A student spends 37.5% of her money on food, 28.75% on rent and 15% on books. What percentage of her money is left to spend on other things

Answer 1

Well all u have to do is add up all the percentages and you get your answer :)

Answer 2

sort of. If you add the %ages, you get how much was spent.
You want the rest.
So, since 100% is everything, subtract the % spent.