\(\dfrac{3}{5}và\dfrac{15}{25}và\dfrac{21}{35};\dfrac{5}{8}và\dfrac{20}{32}\)
\(\dfrac{3}{5}=\dfrac{9}{15}=\dfrac{15}{25}=\dfrac{21}{35}\\ \dfrac{5}{8}=\dfrac{20}{32}\)
\(\dfrac{3}{5}=\dfrac{15}{25}=\dfrac{9}{15}=\dfrac{21}{35};\dfrac{5}{8}=\dfrac{20}{32}\)
`15/25=(3 xx 5)/(5 xx 5)=3/5`
`=>3/5=15/25`
`9/15=(3 xx 3)/(3 xx 5)=3/5`
`=>3/5=9/15=15/25`
`20/32=(5 xx 4)/(8 xx 4(=5/8`
`=>5/8=20/32`
`21/35=(3 xx 7)/(5 xx 7)`
`=>3/5=9/15=15/25=21/35`
Và `5/8=20/32`