Răspuns:
Explicație pas cu pas:
131313/656565 = 13*10101/65*10101 = 13/65 = 1/5
131313 = 13 x 10101
656565 = 65 x 10101
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140014/420042 = 14*10001/42*10001 = 14/42 = 1/3
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70707/616161 = 7*10101/61*10101 = 7/61
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50505/373737 = 5*10101/37*10101 = 5/37