Réponses :
Exercice 1 :
[tex] \frac{138}{1035} \\ \\ = \frac{138 \div 23}{1035 \div 23} \\ \\ = \frac{6 \div 3}{45 \div 3} \\ \\ = \frac{2}{15} [/tex]
Exercice 2 :
[tex] \frac{435}{580} \\ \\ = \frac{435 \div 29}{580 \div 29} \\ \\ = \frac{15 \div 5}{20 \div 5} \\ \\ = \frac{3}{4} [/tex]
