GCF
LCM
Add Fractions
Subtract Fractions
100

3 and 6

3

100

4 and 8

8

100

2/7 + 4/7

6/7

100

6/34 -2/34

4/34

200

12 and 30

6

200

6 and 14

42

200

23/462 + 142/462

165/462

200

91/102 - 35/102

56/102

300

24 and 84

12

300

20 and 32

160

300

2/8 + 5/24

7/24

300
16/18-2/6

10/18

400

32 and 128

32

400

27 and 117

351

400

11/30 + 4/7

197/210

400

17/20-3/12

36/60

500

63 and 324

9

500

64 and 112

448

500

14/32 + 5/44

194/352

500

13/28-4/21

23/84