Question

Which of the following equations of ratios make a true proportion?

Answer 1

A)
`(15)/(90) = (3)/(18)`
15 ÷ 3 = 5
90 ÷ 18 = 5

B)
`(17)/(19) = (51)/(93)`
51 ÷ 17 = 3
93 ÷ 19 ≈ 4.9

C) None of these choices are correct

D)
`(20)/(100) = (5)/(40)`
20 ÷ 5 = 4
100 ÷ 40 = 2.5

E)
`(120)/(100) = (5)/(6)`
120 ÷ 5 = 24
100 ÷ 6 ≈ 16.7


Having done the math, the answer is A.

Answer 2

The first choice is correct. We can check it by cross multiplication.      15x18=270 also 3x90=270.