Đáp án:
Giải thích các bước giải:
\(\begin{array}{l}\frac{2}{5};\,\frac{3}{{35}};\,\frac{{27}}{{60}};\,\frac{{18}}{3}\\\frac{2}{5} = \frac{{2 \times 24}}{{5 \times 24}} = \frac{{48}}{{100}}\,\,\,\,\,\,la\,phan\,\,so\,\,thap\,phan\\\frac{3}{{35}} = \frac{3}{{7 \times 5}}\\\frac{{27}}{{60}} = \frac{{3 \times 9}}{{3 \times 20}} = \frac{9}{{20}} = \frac{{45}}{{100}}\,\,\,\,la\,phan\,\,so\,thap\,\,phan\\\frac{{18}}{3} = 6 = \frac{6}{1} = \frac{{600}}{{100}}\,\,\,\,la\,\,phan\,\,so\,\,thap\,\,phan\\Vay\,cac\,phan\,\,so\,viet\,dc\,\,thanh\,phan\,so\,thap\,phan\,la:\frac{2}{5};\,\frac{{27}}{{60}};\,\frac{{18}}{3}\\\end{array}\)
