ANSWER
Since the word altogether which is the key word means the sum so we will add all the fractions i.e
= 1/5 + 1/4 + 2/7
LCM of 5,4 and 7 = 140
= ⅕×140 + ¼×140 + ²/⁷×140
140
= 28 + 35 + 40
= 103
Therefore the total fraction is 103
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