Bonsoir,
a. 3/7 : 4/5
= 3/7 x 5/4
= 15/28
b. 6/11 : 5/4
= 6/11 x 4/5
= 24/55
c. 11/9 : 1/2
= 11/9 x 2
= 22/9
d. 15/4 : 2
= 15/4 x 1/2
= 15/8
e. 4 : 7/9
= 4 x 9/7
= 36/7
f. 3/8 : 5/7
= 3/8 x 7/5
= 21/40
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Bonsoir,
a. 3/7 : 4/5
= 3/7 x 5/4
= 15/28
b. 6/11 : 5/4
= 6/11 x 4/5
= 24/55
c. 11/9 : 1/2
= 11/9 x 2
= 22/9
d. 15/4 : 2
= 15/4 x 1/2
= 15/8
e. 4 : 7/9
= 4 x 9/7
= 36/7
f. 3/8 : 5/7
= 3/8 x 7/5
= 21/40