3 1/8 times 4= 12.5
to solve this problem, you have to make the mixed fraction into a regular fraction. You do this by multiply the denominator (8) by the whole number (3) which equal 24. After this you add this (24) to (1) which equal 25. So now you have 25/8 times 4. You multiply 25 times 4 which is 100. Then divide that by 8 which equal 12.5
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