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2012-12-17T21:25:01-02:00

mdc (84/72)   = 12

84/12 = 7

72/12 = 6

7/6

mdc (54/90)   = 18

54/18 = 3

90/18 = 5

3/5

mdc (98/28)   = 14

98/14 = 7

28/14 = 2

7/2

                           mdc (147/189)   = 21

                            147/21 = 7

                           189/21= 9

                           7/9

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