Please help I will give you a lot of points and the brainiest. You don't have to show your work if you don't want to, just the answer.

--Just so you know this isn't the regular kind of subtraction we use everyday. (This uses Hindu-Arabic number system)

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.