Сократим каждую дробь:
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$$\frac{10}{25} = \frac{10 \div 5}{25 \div 5} = \frac{2}{5}$$
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$$\frac{14}{49} = \frac{14 \div 7}{49 \div 7} = \frac{2}{7}$$
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$$\frac{88}{99} = \frac{88 \div 11}{99 \div 11} = \frac{8}{9}$$
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$$\frac{24}{48} = \frac{24 \div 24}{48 \div 24} = \frac{1}{2}$$
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$$\frac{12}{60} = \frac{12 \div 12}{60 \div 12} = \frac{1}{5}$$
Ответ: 1) \(\frac{2}{5}\), 2) \(\frac{2}{7}\), 3) \(\frac{8}{9}\), 4) \(\frac{1}{2}\), 5) \(\frac{1}{5}\)