1/10 - 1/14 = ?
Since the number 70 is your LCD we have to put it in the denominator's place.
7/70 - 5/70
The denominators are the same so we leave them alone
7 - 5 = 2
2/ 70
Lets look for a fraction that is 'equivalent' to2/70 (if you want )
1/35 is one of them so that is your answer!
Good Luck!