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b) 1 7/8 * 2 2/5 = 15/8 * 12/5 = 180/40 = 90/20 = 45/10 = 9/2 = 4 1/2
c) 3 1/3 * 4 4/5 = 10/3 * 24/5 = 240/15 = 48/3 = 16