convert the fractions so the denominators are the same if they aren't already. then add the numerators, but keep the denominator the same.
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The two fractions are 1/6 and 3/8
That their sum is always equal to the denominator.
The sum of two fractions will only be a whole number if the fractions have a common denominator. When the denominators are different, the sum will be a fraction with a different denominator, making it impossible to be a whole number. Thus, estimating the sum of two fractions will generally result in a fraction, not a whole number.
The sum of two numbers is a whole number if both of the numbers are whole numbers, or if the sum of two fractions can be simplified to a whole number.
Numerators