Question

Which pair of fractions are proportional?

a.6/7 and 16/21

b.21/36 and 14/25

c.14/35 and 21/42

d.36/54 and 6/9

Answer 1

letter D 36/54 and 6/9 is the proportional fraction 

Answer 2

d.
`(36)/(54)` and
`(6)/(9)`

Explanation:

If two proportion
`(a)/(b)` and
`(c)/(d)` are proportional

Then product of a and d is equal to product of b and c

a.
`(6)/(7)` and
`(16)/(21)`

Product of 6 and 21=
`6* 21=126`

product of 7 and 16=
`7* 16=112`

Hence, given fractions are not proportional.

Option a is false

b.
`(21)/(36)` and
`(14)/(25)`

`14* 36=504`

`21* 25=525`

Hence, option b is false.

c.
`(14)/(35)` and
`(21)/(42)`

`14* 42=588`

`35* 21=735`

Hence, option c is false.

d.
`(36)/(54)` and
`(6)/(9)`

`36* 9=324`

`54* 6=324`

Given fractions are proportional

Hence, option d is true.