### Sample Problem

Fill the missing numbers.

(a)  55:5 = :1

(b)  18:27 = 6:

#### Solution

(a)  55:5 = (55 ÷ 5) : (5 ÷ 5) = 11:1

(b)  18:27 = (18 ÷ 3) : (27 ÷ 3) = 6:9
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