how to subtract fractions from whole numbers 10 steps to subtract fractions from whole numbers convert the whole number to a fraction by putting it over 1 then adjust the fractions to have like denominators by multiplying the new fraction by the denominator of the original fraction subtract the numerators of the two numbers and convert the answer to a mixed number if necessary subtracting a fraction from a whole number mathwizz subtracting a fraction from a whole number now we subtract fractions like any other fractions help what do you need help with subtracting a fraction from a whole number create a mixed number of equal value to the whole number by using the denominator of the fraction and creating a value of one then subtract