1) [tex] (5\frac{1}{5}-2 \frac{2}{5}):2 \frac{1}{3}=( \frac{5*5+1}{5}- \frac{2*5+2}{5}): \frac{2*3+1}{3}=\frac{26-12}{5}* \frac{3}{7}= \frac{14*3}{5*7}= \frac{2*3}{5}= \frac{6}{5} [/tex]=[tex]1 \frac{1}{5} [/tex]
2) ([tex] (\frac{2*5+1}{5}- \frac{4}{5})* \frac{1*7+3}{7}= \frac{11-4}{5}* \frac{10}{7}= \frac{7*2*5}{5*7}=2 [/tex]
