Greatest Common Factor
Basics
Lowest Terms
Least Common Denominator
Improper to Mixed Numbers
Mixed to Improper
Change the Numerator
100

15 and 21

What is 3?

100

1.03 is read as a mixed number.

What is 1 3/100?

100

3/6

What is 1/2?

GCF (3,6): 3

3 / 3 = 1

6 / 3 = 2

100

The common denominator of 1/2, 3/4

What is 4?

100

10/9

What is 1 1/9?

10/9 = 1 r1/9. Can't Reduce!

100

3 4/7

25/7

7 x 3 = 21; 21 + 4 = 25. Keep the denominator.

100

The new fraction for 3/4 if the denominator is 12.

What is 9/12?

The common multiplier is 3.

4 x 3 = 12

So, 3 x 3 = 9

200
24 and 32
What is 8?
200

Mary used 7/12 of the eggs and Paul used 4/12 of the eggs. The total fraction of eggs used was what?

What is 11/12 of the eggs?

200

8/24

What is 1/3?

GCF (8,24): 8

8 / 8 = 1

24 / 8 = 3

200

The common denominator of 5/6, 3/8

What is 24?

200

6/4

What is 1 1/2?

6/4 = 1 r2/4 -> 2/4=1/2

200

65/8

53/8

8 x 6 = 48; 48+ 5 = 53. Keep the denominator.

200

The new fraction for 7/9 if the denominator is 72.

What is 56/72?

The common multiplier is 8.

9 x 8 = 72

So, 7 x 8 = 56

300
10 and 30
What is 10?
300

3/8 + 1/8 + 1/8 equals ?

What is 5/8?

300

24/36

What is 2/3?

GCF (24,36): 12

24 / 12 = 2

36 / 12 = 3

300

The common denominator of 7/10, 11/15

What is 30?

300

30/8

What is 3 3/4?

30/8 = 3 r3/4. Can't Reduce!

300

112/3

35/3

3 x 11 = 33; 33 + 2 = 35. Keep the denominator.

300

The new fraction for 5/6 if the denominator is 54.

What is 45/54?

The common multiplier is 9.

6 x 9 = 54

So, 5 x 9 = 45

400
16, 20, and 24
What is 4?
400
If 93 squares in a hundredths grid is shaded, how would this amount be written as a fraction?
What is 93/100?
400

18/45

What is 2/5?

GCF (18,45): 9

18 / 9 = 2

45 / 9 = 5

400

The common denominator of 2/5, 1/6, 3/10

What is 30?

400

192/9

What is 21 1/3?

192/9 = 21 r3/9 -> 3/9 = 1/3

400

119/12

141/12

12 x 11 = 132; 132 + 9 = 141. Keep the denominator.

400

The new fractions for 1/4 and 2/5 if the common denominator is 20.

What is 5/20 and 8/20?

The common multiplier for 1/4 is 5.

4 x 5 = 20

So, 1 x 5 = 5

The common multiplier for 2/5 is 4.

5 x 4 = 20

So, 2 x 4 = 8

500
30 and 45
What is 15?
500
What is 3/4 - 3/6? Don't forget to find common denominators first
3/12 or 1/4
500

63/147

What is 3/7?

GCF (63,147): 7

63 / 7 = 9

147 / 7 = 21

500

The common denominator of 7/12, 15/16, 5/18

What is 144?

500

210/8

What is 26 1/4?

210/8 = 26 r2/8 -> 2/8 = 1/4

500

1325/29

402/29

29 x 13 = 377; 377 + 25 = 402. Keep the denominator.

500

The new fractions for 3/9 and 7/12 if the common denominator is 36.

What is 12/36 and 21/36?

The common multiplier for 3/9 is 4.

9 x 4  = 36

So, 3 x 4 = 12

The common multiplier for 7/12 is 3.

12 x 3 = 36

So, 7 x 3 = 21

M
e
n
u