`117/234=(117:117)/(234:117)=1/2`

`90/126=(90:18)/(126:18)=5/7`

`162162/345345=(162162:3003)/(345345:3003)=54/115`

\(\dfrac{117}{234}\)= \(\xrightarrow[234:117]{117:117}\) = \(\dfrac{1}{2}\)                                    \(\dfrac{162162}{345345}\) = \(\xrightarrow[345345:3003]{162162:3003}\) =\(\dfrac{54}{115}\)

\(\dfrac{90}{126}\)= \(\xrightarrow[126:18]{90:18}\) = \(\dfrac{5}{7}\)                                     

a: 90/126=5/7<6/7

b: 70/84=5/6

35/42=5/6

=>70/84=35/42

a)\(\dfrac{90}{126}=\dfrac{5}{7}< \dfrac{6}{7}\Leftrightarrow\cdot\dfrac{90}{126}< \dfrac{6}{7}\)

b)\(\dfrac{70}{84}=\dfrac{5}{6};\dfrac{35}{42}=\dfrac{5}{6}\Leftrightarrow\cdot\dfrac{70}{84}=\dfrac{35}{42}\)

5/7

\(\frac{90}{126}=\frac{5}{7}\)

HT

@@@

D

D

\(\dfrac{90}{126}=\dfrac{90:18}{126:18}=\dfrac{5}{7}\)

D

\(\frac{90}{126}\)=\(\frac{90:18}{126:18}\)=\(\frac{5}{7}\)

 Học tốt

90      90 : 9        10     10 :   2      5

--     = --------- =  ---   = ---------- = ----

126    126 : 9     14      14 :   2      7

ko bt

\(\dfrac{18}{45}=\dfrac{2}{5}\dfrac{63}{81}=\dfrac{7}{9}\) minh chi co the lam the nay thoi vi minh dang co viec gap

a, 24/40 = 3/5

a ) 2 7 ; b ) − 11 4 ; c ) − 59 42 ; d ) − 13 18