figure it out ur self
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2/3 + 5/7 + 2/5
Make each of the denominators the same, by finding the LCD, i.e. 105.
To make 2/3 have a denominator of 105, multiply it by 35/35.
Similarly, multiply 5/7 by 15/15, and 2/5 by 21/21.
Therefore,
2/3*35/35 + 5/7*15/15 + 2/5*21/21
= 70/105 + 75/105 + 42/105
= (70 + 75 + 42)/105
= 187/105
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