Question

I need help proving each of the following numbers are rationals

87.125

-30

-8.3

58.25

121

4.5

3 7/10

Answer 1

Well, if a number is rational it can be written as a fraction and a decimal. For each of the examples above, you can rewrite each example as a fraction/decimal

For the first one, it equals 87 1/8

For the second one, it is already in fraction/decimal form

For the third one, you can rewrite this as -8 3/10

For the fourth one, you can rewrite this as 58 1/4

For the fifth one, it is already in fraction/decimal form

For the sixth one, you can rewrite this as 4 1/2

For the seventh one, you can rewrite this as 3.7