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Решите ( А и Б )

(2/5-6,6) : (-1 1/4 - 1 1/3) = -6,2 : (- 5/4 - 4/3) = -6,2 : (-15/12 - 16/12)= -6,2 * (-12/31) = 6,2 * 12/31=2,42-(6 7/8 - 7 1/3) : 3/4 = 2-(7/8 - 4/3) *4/3 = 2 - (21/24 - 32/24) * 4/3 = = 2 -  11/24 * 4/3 = 2 - 11/18 = 1 7/18