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b) 2/5:3/20=2/5 * 20/3=8/3=2 2/3
c) 5/9:25/6=5/9 * 6/25=2/15
d) 8/21:6/7=8/21 * 7/6=4/9
e) 2 7/9:1 2/3=25/9 * 3/5=5/3=1 2/3
f) 1 2/3: 2 7/9= 5/3 * 9/25=3/5
g) 4:6 2/5=4/1 *5/32=5/8
h)6 2/9 :7 = 56/9 * 1/7=8/9