a)
3/5 = (3*7)/(5*7) = 21/35
b)
3/4 = (3/15)/(4*15) = 45/60
c)
80/100= (80/20)/(100/20) =4/5
d)
49/21 = (49/7) /(21/7) = 7/3
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bonsoir;
a)
3/5 = (3*7)/(5*7) = 21/35
b)
3/4 = (3/15)/(4*15) = 45/60
c)
80/100= (80/20)/(100/20) =4/5
d)
49/21 = (49/7) /(21/7) = 7/3