Question

So sánh hai tỉ số \(\frac{{12}}{{28}}\) và \(\frac{{7,5}}{{17,5}}\)

Answer 1

Ta có:

\(\begin{array}{l}\frac{{12}}{{28}} = \frac{{12:4}}{{28:4}} = \frac{3}{7};\\\frac{{7,5}}{{17,5}} = \frac{{75}}{{175}} = \frac{{75:25}}{{175:25}} = \frac{3}{7}\end{array}\)

Vậy \(\frac{{12}}{{28}}\) = \(\frac{{7,5}}{{17,5}}\)

Answer 2

12/28=3/7

7,5/17,5=3/7

=>12/28=7,5/17,5