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9/18=1/2
50/200=1/4
b
15/20
10/20
18/20
c
1/2=15/30
3/4=15/20
5/7=15/31
9/18= 1/3
50/200= 1/4
b)
3/4= (3*5)/(4*5) = 15/20
1/2= (1*10)/(2*10) = 10/20
4/5=(4*4)/(5*4) = 16/20
c)
1/2= (1*15)/(2*15) = 15/30
3/4= (3*5)/(4*5) = 15/20
5/7=(5*3)/(7*3) = 15/21