Ko thiếu dữ liệu

\(\frac{1}{4}\)+\(\frac{1}{8}\)+\(\frac{1}{16}\)+\(\frac{1}{24}\)+\(\frac{1}{48}\)+\(\frac{1}{28}\)

=\(\frac{3}{8}\)+ \(\frac{1}{16}\)+\(\frac{1}{24}\)+\(\frac{1}{48}\)+\(\frac{1}{28}\)

=\(\frac{7}{16}\)+\(\frac{1}{24}\)+\(\frac{1}{48}\)+\(\frac{1}{28}\)

=\(\frac{23}{48}\)+\(\frac{1}{48}\)+\(\frac{1}{28}\)

=\(\frac{24}{48}\)+\(\frac{1}{28}\)

=\(\frac{1}{2}\)+\(\frac{1}{28}\)

=\(\frac{15}{28}\)