Question

Which of the following in not equivalent to 3/7 *

-15/-35
15/35
6/14
-9/21​

Answer 1

Answer:

They can be:

6

14

,

9

21

,

12

28

and so on.

Explanation:

If you have a fraction

a

b

then any fraction

k

a

k

b

for a natural number

k

is equivalent to

a

b

, because it can be reduced by

k

.

Example:

3

7

=

3

⋅

2

7

⋅

2

=

6

14

3

7

=

3

⋅

3

7

⋅

3

=

9

21

Also if

a

and

b

have any common factors greater than

1

you can get other equivalent fractions by reducing original fraction by the factors. For example:

9

12

=

3

⋅

3

3

⋅

4

=

3

4

.

So

3

4

is equivalent to

9

12