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we will finf the lcm of 7 and 8 which is 56
then 3/7*8=24/56
2/8*7=14/56
24+14/56
Answer= 38/56
Subratct
we will find the lcm of 2 and 4 which is 4
then 3/2*2=6/4
1/4*1=1/4
6-1/4
Answer = 5/4
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