Which pair of ratios forms a proportion? (4/5 10/13), (7/8 15/18), and (1/2 14/28)

a proportion is a part of a whole

so which ones can you change the denominator to make them fit together?

a part, share, or number considered in comparative relation to a whole

knowing that which is your answer?

5 can create 10 but 4 can not mak 13

Goat mom -- I think you mean whole number.

Why not get down to the problem?

Is there a whole number that multiplies by 4 and 5 to make 10 an 13?
Is there a whole number that multiplies by 7 and 8 to make 15 and 18
Is there a whole number tha tmultiplies by 1 and 2 to make 14 and 28?

If yes, there is a proportion. If no, there isn't. For example,
look at the pair of 2/3 and 8/12. If we multiply 4 x 2 we get 8 and 4 x 3 = 12 so the pair of 2/3 and 8/12 is a proportion.

4/5 10/13

idk im bad at this

Well can you multiply 5 by any hole number to = 13? can you divide 13 by any hole number to = 5?

4/5 does not equal 10/13.

Multiply both the numerator and denominator by the same number.
4/5 * 2 = 8/10
4/5 * 3 = 12/15