SOLUTION: evaluate the expression 7/8 - 4/9 leave in fractional form

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Question 105304: evaluate the expression
7/8 - 4/9
leave in fractional form
Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
Solved by pluggable solver: Fractions Solver


Start with the given expression




In order to subtract these two fractions, these fractions need to have a common denominator.


In order to do that, we simply find that the LCM of 8 and 9 is 72 (note: if you need help with finding the LCM, check out this solver)


Now we need to get each denominator to 72



Multiply by


Multiply and to get



Multiply by


Multiply and to get



Since both fractions have a common denominator of 72, we can now combine the fractions


Combine the fractions


Subtract the numerators



So
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