=3/11 nha bạn!. Có cần cách làm ko?
\(\frac{0,75-0,6+\frac{3}{7}+\frac{3}{13}}{2,75-2,2+\frac{11}{7}+\frac{11}{13}}=\frac{3\left(0,25-0,2+\frac{1}{7}+\frac{1}{13}\right)}{11\left(0,25-0,2+\frac{1}{7}+\frac{1}{13}\right)}=\frac{3}{11}\)
=\(\frac{\frac{3}{2}+\frac{3}{7}+\frac{3}{13}}{\frac{11}{2}+\frac{11}{7}+\frac{11}{13}}=\frac{3\left(\frac{1}{2}+\frac{1}{7}+\frac{1}{13}\right)}{11\left(\frac{1}{2}+\frac{1}{7}+\frac{1}{13}\right)}=\frac{3}{11}\)