Answer :
6/7-2/5 -> Find LC denominator ->35
7x5=35 so multiply num and den of 6/7 by 5
5x7=35 so multiply num and den of 2/5 buy 7
Works out to: 30/35 - 14/35
30-14= 16 answer is 16/35
7x5=35 so multiply num and den of 6/7 by 5
5x7=35 so multiply num and den of 2/5 buy 7
Works out to: 30/35 - 14/35
30-14= 16 answer is 16/35
