Răspuns:
a) 9/8
b) 105/64
Explicație pas cu pas:
a)
[tex]\frac{4}{5} *\frac{15}{8} :\frac{12}{9}=\\\\\frac{3}{2} *\frac{9}{12} =\\\frac{27}{24} =\\\frac{9}{8}[/tex]
b)
[tex]\frac{33}{44} *\frac{77}{88} *\frac{55}{22} =\\\frac{3}{4} *\frac{7}{8} *\frac{5}{2} =\\\frac{105}{64} =\\[/tex]
