Explanation:
If r is 1/6 then we'll have 1/4*1/6+7/24.
Firstly we will multiply 1/4 and 1/6 which will give us 1/24.
Then we will add 1/24 and 7/24 which will give us 8/24.
Then we reduce it to it's lowest term that is 1/3.TRY THIS.
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