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find the missing number of the form the lowest term of each fraction. Encircle the letter of the correct answer.

1. 3/9=?/3
a.1 b.2 c.3 d.4

2. 8/12=?/3
a.1 b.2 c.3 d.4

3. 10/25=?/5
a.1 b.2 c.3 d.4

4. 7/21=1/?
a.4 b.3 c.2 d.1

5. 15/25=3/?
a. 5 b.4 c.3 d.2​