Pregunta: Dados los siguientes grupos de fracciones, decir de cada fracción si es irreductible o no:1) ${3}/{5}$  y ${4}/{2}$  y ${4}/{7}$  
2) ${30}/{12}$  y ${5}/{8}$  y ${7}/{3}$  
3) ${5}/{15}$  y ${8}/{28}$  y ${3}/{24}$  
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