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2.) 4 1/2 :2 1/4 : 1 3/4 = 9/2 : 9/4 : 7/4 = 9/2 x 4/9 x 4/7 = 8/7 = 1 1/7
4 1/2 : 2 1/4 : 1 3/4 = 144/108 = 1 1/3