1. 11/20 x 4/14= 11/70
2. 7/18 x 11/25= 77/450
3. 3/15 x 3/7= 3/35
4. 2/4 x 3/6= 1/4
5. 1/2 x 2/5= 1/5
6. 1/3 x 2/9= 2/27
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