Answer: 12. 5/20
13. 12/16
14. 35/15
15. 20/36
18.45/24
Step-by-step explanation: 12. 4x5=20 so 1x5=5 so its 5/20
13. 3x4=12 so 4x4=16 so its 12/16
14. 7x5= 35 so 3x5=15 so its 35/15
15. 9x4=36 so 5x4=20 so its 20/36
18. 15x3=45 so 8x3=24 so its 45/24
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