The common denominator is 4
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A common denominator is 32.
The lowest common denominator would be twelve!
-- Find a common denominator. (It will be a number of which all three denominators are factors. The best choice is their least common multiple.) -- Change the fractions to their equivalents with the common denominator. -- Then add their numerators to get the numerator of their sum.
The common denominator of three fourths and one fifth is twenty. The fractions including the common denominator can look like this: 3/4 to 15/20 and 1/5 to 4/20. Hope this helps!! ^^
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.