(4)
18/30
18 = 2 x 9
= 2 x 3x 3
30 = 2 x 15 = 2
x 3 x 5
Therefore 2 x 3 = greatest
common factor
6 = "
" "
so 18/6
= 3
30/6 = 5
when reduced to lowest terms
= 3/5
(5)
8/12
8 = 2 x 4 = 2 x 2 x
2
12
= 2 x 6 = 2 x 2
x 3
Therefore 2 x 2 = greatest
common factor
4 = "
" "
8/4
= 2
12/4
= 3
reduced to lowest terms
= 2/3
(6)
6/24
6 =2
x 3
24 = 2 x 12 = 2 x 2 x 6
= 2 x 2 x 2 x 3
Therefore 2 x 3 = greatest
common factor
6 = "
"
"
6/6
= 1
24/6
=
4
reduced fraction = 1/4
(7)
5/100
5 = 5
100 =
5 x 20
Therefore 5
= greatest common factor
so 5/5
= 1
100/5
= 20
reduced fraction = 1/20
(8)
3/9
3 = 3
9 = 3 x 3
Therefore 3 = greatest common
factor
so 3/3 = 1
9/3 = 3
reduced terms = 1/3
(9)
12/20
12 = 2 x 6 = 2 x 2
x 3
20 = 2 x 10 = 2 x
2 x 5
Therefore 2 x 2 =
greatest common factor
4 = "
" "
so 12/4
= 3
20/4
= 5
lowest possible term = 3/5
(10)
12/14
12 = 2 x 6
14 = 2 x 7
Therefore 2
=
greatest common factor
so 12/2
= 6
14/2 = 7
reduced fraction = 6/7
(11)
30/55
30 = 2 x 15 = 2 x 3 x 5
55 = 5 x 11
Therefore 5
= greatest common factor
30/5
=
6
55/5
= 11
reduced fraction =
6/11
(12)
15/20
15
= 3 x 5
20
= 2 x 10 = 2 x 2 x 5
Therefore
5 = greatest common factor
15/5
= 3
20/5
= 4
reduced
fraction term = 3/4 |
(13)
12/16
12 = 2 x 6 = 2 x 2 x 3
16 = 2 x 8 = 2 x 2 x 4
Therefore 2 x 2 = greatest
common factor
4 = "
" "
12/4 = 3
16/4 = 4
reduced fraction = 3/4
(14)
18/27
18 = 2 x 9 = 2 x 3 x 3
27 = 3 x 9 = 3 x 3 x 3
Therefore 3 x 3 =
greatest common factor
9 = "
" "
18/9 = 2
27/9 = 3
reduced fraction =
2/3
(15)
54/63
54
= 2 x 27 = 2 x 3 x 9 = 2 x 3 x 3 x 3
63 = 3 x 21 = 3 x 3 x 7
Therefore 3 x 3 =
greatest common factor
9 = "
"
"
54/9 = 6
63/9 = 7
lowest terms = 6/7
(16)
15/21
15 = 3 x 5
21 = 3 x 7
Therefore 3 = greatest common
factor
15/3 = 5
21/3 = 7
lowest terms =
5/7
(17)
6/30
6 = 2 x 3
30 = 2 x 15 = 2 x 3 x 5
Therefore 2
x 3 = greatest common factor
6 = " "
"
6/6 = 1
30/6 = 5
reduced fraction = 1/5
(18)
2/18
2 = 2
18 = 2 x 9
Therefore 2 = greatest
common factor
so 2/2 = 1
18/2 = 9
lowest terms = 1/9
(19)
4/22
4 = 2 x 2
22 = 2 x 11
Therefore greatest common
factor = 2
4/2 = 2
22/2 = 11
reduced fraction = 2/11
(20)12/132
12 = 2 x 6 = 2 x 2 x 3
132
= 2 x 66 = 2 x 2 x 33 = 2 x 2 x 3 x 11
Therefore
2 x 2 x 3 = greatest common factor
12 = " "
"
12/12
= 1
132/12
= 11
therefore
12/132 reduced to its lowest possible terms is 1/11 |