a)\(\frac{42}{15.7}\)= \(\frac{2.3.7}{3.5.7}\)= \(\frac{2}{5}\)
b) \(\frac{35.6}{336}\)= \(\frac{5.7.6}{6.7.8}\)= \(\frac{5}{8}\)
c) \(\frac{4.33}{11.12}\)= \(\frac{4.3.11}{11.3.4}\)= 1
d) \(\frac{9.4+9.11+5.9}{63}\)= \(\frac{9.\left(4+11+5\right)}{9.7}\)= \(\frac{20}{7}\)
#Hk tốt nhé
\(\frac{42}{17.7}\)
\(=\frac{6}{17.1}\)
\(=\frac{6}{17}\)