Subtracting fractions is easier than you think since it is very similar to adding fractions. Just like adding fractions, there are two important things you need to know:
Example #1:
5
2

−
1
2
= ?

So,
5
2

−
1
2

=
5 − 1
2

=
4
2
= 2

7
3

−
3
6
= ?

So,
7
3

−
3
6

=
7 × 2
3 × 2

−
3
6

=
14
6

−
3
6

=
11
6

3
5

−
2
4
= ?

So,
3
5

−
2
4

=
3 × 4
5 × 4

−
2 × 5
4 × 5

=
12
20

−
10
20

=
2
20

5
2

−
1
2
= ?

So,
5
2

−
1
2

=
5 − 1
2

=
4
2
= 2

7
3

−
3
6
= ?

So,
7
3

−
3
6

=
7 × 2
3 × 2

−
3
6

7
3

−
3
6

=
14
6

−
3
6

=
11
6

3
5

−
2
4
= ?

So,
3
5

−
2
4

=
3 × 4
5 × 4

−
2 × 5
4 × 5

3
5

−
2
4

=
12
20

−
10
20

=
2
20

Jul 20, 21 10:08 AM
Learn to calculate the mean of a discrete random variable with this easy to follow lesson