So welcome to my video on subtracting mixed numbers here we have 3 and 3/4 being subtracted by 1 and 7/8 and the first thing I like to do and I wrote this for you and green is I like to convert the mixed numbers to improper fractions and then subtract and I do realize that there are quicker ways to subtract mixed numbers however this method which I'm teaching is guaranteed to work the same way for every single problem whereas the other methods that might be a little quicker are not guaranteed to work the same way for every single problem so let's just get started right away let's convert our mixed numbers into improper fractions we'll start first to a 3 and 3/4 since this mixed number has a 4 in the denominator our improper fraction is also going to have a 4 in the denominator and then in the numerator we have to multiply the denominator 4 with the whole number of 3 so 4 times 3 is equal to 12 and then we have to add that with our numerator of 3 and this is all being subtracted with 1 and 7/8 so let's do the same thing with this mixed number let's change it into an improper fraction since it has a denominator of 8 the improper fraction is also going to have a denominator of 8 and in the numerator we multiply the 8 by the whole number of 1 8 times 1 is 8 and then we add all that to the numerator of 7 so let's simplify these two fractions in the first fraction we have 12 plus 3 in the numerator 12 plus 3 is equal to 15 and our denominator stays the same and this is all being subtracted...

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