Điền số thích hợp vào chỗ trống:

\(\frac{{72}}{{96}} = \frac{{36}}{{48}} = \frac{9}{{12}}\)

Giải thích

\(\begin{array}{l}\frac{{72}}{{96}} = \frac{{72:2}}{{96:2}} = \frac{{36}}{{48}}\\\frac{{36}}{{48}} = \frac{{36:4}}{{48:4}} = \frac{9}{{12}}\end{array}\)

\(\frac{{180}}{{240}} = \frac{{45}}{{60}} = \frac{{15}}{{20}}\)

Giải thích

\(\begin{array}{l}\frac{{180}}{{240}} = \frac{{180:4}}{{240:4}} = \frac{{45}}{{60}}\\\frac{{45}}{{60}} = \frac{{45:3}}{{60:3}} = \frac{{15}}{{20}}\end{array}\)

\(\frac{{48}}{{42}} = \frac{{16}}{{14}} = \frac{8}{7}\)

Giải thích

\(\begin{array}{l}\frac{{48}}{{42}} = \frac{{48:3}}{{42:3}} = \frac{{16}}{{14}}\\\frac{{16}}{{14}} = \frac{{16:2}}{{14:2}} = \frac{8}{7}\end{array}\)