Question

ta có A chia B bằng 2/3, B chia C ta có 6/7.

hỏi ta lấy A chia C được bao nhiêu

Answer 1

\(\frac{A}{B}=\frac{2}{3};\frac{B}{C}=\frac{6}{7}\)

\(\frac{B}{C}=\frac{3}{3,5}\)

\(\frac{A}{C}=\frac{2}{3,5}=\frac{4}{7}\)

Answer 2

\(\frac{A}{B}=\frac{2}{3};\frac{B}{C}=\frac{6}{7}\Rightarrow\frac{A}{2}=\frac{B}{3};\frac{B}{6}=\frac{C}{7}\)\(\Rightarrow\frac{A}{4}=\frac{B}{6}\Rightarrow\frac{A}{4}=\frac{B}{6}=\frac{C}{7}\Rightarrow\frac{A}{C}=\frac{4}{7}\)