please solve the problem
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mohar75:
good night
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1. 15/4×2/5 = 3/2
4. 156/121×22/13 = 24/11
7. 7/3×6/7×4/9 = 8/9
4. 156/121×22/13 = 24/11
7. 7/3×6/7×4/9 = 8/9
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