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Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.