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2 1/3 - 2/7 = 7/3 - 2/7 = 49/21 - 6/21 = 43/21 = 2 1/21 5 1/2 * 3/7 = 11/2 * 3/7 = 33/14 = 2 5/14 2 1/4 : 3/8 = 9/4 : 3/8 = 9/4 * 8/3 = 72/12 = 6

2 1/3-2/7=2 7/21-6/21=2 1/21 5 1/2 *3/7=11/2*3/7=33/14=2 5/14