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Exercice 99 :
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Enoncé :
Simplifiez les fractions suivantes :
\(\dfrac{84}{126}\)
\(\dfrac{64}{96}\)
\(\dfrac{75}{100}\)
\(\dfrac{42}{70}\)
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Solution :
\(\dfrac{84}{126} = \dfrac{42\times 2}{42\times 3} = \dfrac{2}{3}\)
\(\dfrac{64}{96} = \dfrac{32\times 2}{32\times 3} = \dfrac{2}{3}\)
\(\dfrac{75}{100} = \dfrac{25\times 3}{25\times 4} = \dfrac{3}{4}\)
\(\dfrac{42}{70} = \dfrac{14\times 3}{14\times 5} = \dfrac{3}{5}\)