Ответ:\(\frac{10}{9}=1\frac{1}{9}\);\(\frac{15}{7}=2\frac{1}{7}\);\(\frac{45}{10}=4\frac{5}{10}=4\frac{1}{2}\);\(\frac{56}{4}=14\);\(\frac{87}{21}=4\frac{3}{21}=4\frac{1}{7}\).