\(\frac{57}{133}=\frac{57\div19}{133\div19}=\frac{3}{7}\)

\(\frac{189}{210}=\frac{189\div21}{210\div21}=\frac{9}{10}\)

\(\frac{7676}{8484}=\frac{7676\div404}{8484\div404}=\frac{19}{21}\)

lần lượt = 3/7 ; 9/10 ; 19/21

Ta có :

\(\frac{57}{133}=\frac{57:19}{133:19}=\frac{3}{7}\)

\(\frac{189}{210}=\frac{189:21}{210:21}=\frac{9}{10}\)

\(\frac{7676}{8484}=\frac{7676:404}{8484:404}=\frac{19}{21}\)

ta có:

\(\frac{189}{210}=\frac{9}{10}\)

\(\frac{7676}{8484}=\frac{19}{21}\)

học tốt nhé!!

189/210=9/10

7676/8484=19/21

 k mk nha mn 

189/210=9/10

7676/8484=19/21

a) 9/10

cung chia het cho 21

b)19/21

cung chia het cho 404

a)9/10

b)19/21

k mk nhé

\(\frac{189}{210}=\frac{189:21}{210:21}=\frac{9}{10}\)

\(\frac{7676}{8484}=\frac{7676:404}{8484:404}=\frac{19}{21}\)

63/70

19/21

Mình cũng không biết đúng hay sai,theo mình kết quả là:

189/210 rút gọn là 63/70

7676/8484 rút gọn là 1919/2121.

19/21

7676/8484=19/21 nha

tk mình nha

19/21 nha

Đáp án là: 19/21

\(\frac{19}{21}\)

19/21

bằng 19/21  

7676/8484 =7676:404/8484:404

\(\frac{7676}{8484}=\frac{19}{21}\)

k cho mk nhé

\(\frac{19}{21}\)

a) \(\frac{189}{210}=\frac{3.7.9}{2.3.5.7}=\frac{9}{10}\); b) \(\frac{7676}{8484}=\frac{4.19.101}{4.3.7.101}=\frac{19}{21}\)

cam on ban PHAM HO THANH QUANH nha

7676/8484= 19/21

OK

=19/21

\(\frac{7676}{8484}=\frac{19}{21}\)