Question

3/4-6/21

Answer 1

13/28

Answer 2

\(\dfrac{3}{4}-\dfrac{6}{21}=\dfrac{63}{84}-\dfrac{24}{84}=\dfrac{39}{84}=\dfrac{13}{28}\)

Answer 3

13/28

Answer 4

13/28

Answer 5

\(\dfrac{3}{4}-\dfrac{6}{21}=\dfrac{3\times21}{4\times21}-\dfrac{6\times4}{21\times4}=\dfrac{63}{84}-\dfrac{24}{84}=\dfrac{13}{28}\)

Answer 6

13/28

tik cho mik

Answer 7

\(\dfrac{3}{4}-\dfrac{6}{21}=\dfrac{3}{4}-\dfrac{2}{7}=\dfrac{21}{28}-\dfrac{8}{28}=\dfrac{13}{28}\)