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(2/3*9/4) + (2/3:9/4) =
(18/12) + (2/3*4/9) =
18/12 + 8/27 = 3/2 + 8/27 = 81/54 + 16/54 = 97/54 = 1 43/54
2/3 x 2 1/4 = 3/2 = 2/3x9/4 = 1 1/2
iloraz
2/3 : 2 1/4 = 2/3 x 4/9 = 8/27
1 1/2 + 8/27 = 81/54 + 16/54 = 97/54 = 1 43/54