You can put this solution on YOUR website! 3 1/5+ 2 1/4
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= (16/5) + (9/4)
since you are adding you need a common denominator for the two fractions.
lcm = 20
= (4*16)/lcm + (5*9)/lcm
Now you can combine the numerators of the lcm
= [64 + 45)/lcm
= 109/20
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Cheers,
Stan H.