Question

How do you work out 6 x 3/2 =21 this is a example how do we do it

Answer 1

6 x 3/2 =12
Here are the steps.
since 6 = 6/1, we can do....
6 3 18
-- x -- = ------- (times the top 2 together and the bottom 2 together)
1 2 2

Then we can simplify 18/2
18 9
---- = ---- = 9
2 1

Answer 2

Whoa !
Before we talk about 'how', we need to agree on 'what'.

Are you saying that you have the problem ' 6 x 3/2 ',
and you know that the answer is ' 21 ' and you want to know
how the answer was worked out ?

You can stop right there.

To multiply a fraction by a whole number, just multiply the
numerator of the fraction by the whole number. Then
simplify the fraction if it needs simplifying.

6 x 3/2 = (6 x 3) / 2 = 18/2 .

To simplify 18/2 , divide top and bottom by 2.
Then you have ' 9 ' , and that's the answer.

' 6 x 3/2 ' is equal to 9 , not 21 .