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\(\frac{2}{5}=\frac{12}{30}=\frac{40}{100}\)
\(\frac{4}{7}=\frac{12}{21}=\frac{20}{35}\)
\(HokT\)
Vì:
\(\dfrac{12}{20}=\dfrac{12:4}{20:4}=\dfrac{3}{5}\)
\(\dfrac{12}{14}=\dfrac{12:2}{14:2}=\dfrac{6}{7}\)
\(\dfrac{18}{21}=\dfrac{18:3}{21:3}=\dfrac{6}{7}\)
\(\dfrac{60}{100}=\dfrac{60:20}{100:20}=\dfrac{3}{5}\)
Vậy \(\dfrac{3}{5}=\dfrac{12}{20}=\dfrac{60}{100}\) ; \(\dfrac{6}{7}=\dfrac{12}{14}=\dfrac{18}{21}\)
\(#Wendy.Dang\)
\(\dfrac{6}{8}=\dfrac{3}{4}=\dfrac{75}{100}\)
\(\dfrac{12}{15}=\dfrac{4}{5}=\dfrac{80}{100}\)
\(\dfrac{7}{28}=\dfrac{1}{4}=\dfrac{25}{100}\)
\(\dfrac{15}{6}=\dfrac{5}{2}=\dfrac{250}{100}\)
\(\dfrac{5}{7}=\dfrac{70}{98};\dfrac{2}{5}=\dfrac{14}{35};\dfrac{1}{8}=\dfrac{9}{72};\dfrac{120}{80}=\dfrac{3}{2}\)
\(\dfrac{5}{7}=\dfrac{70}{98}\)
\(\dfrac{2}{5}=\dfrac{14}{35}\)
\(\dfrac{1}{8}=\dfrac{9}{72}\)
\(\dfrac{120}{80}=\dfrac{3}{2}\)
6/8=21/28
18/27=10/15
28/35=36/45