What is 7/10 - 1/2 in simplest form

The answer is 2/10 cause u multiply 1/2 by 2 until you get 5/10 then subtract

7/10-1/2 in simple form. so the two fractions have different denominators so you need to multiply both denominators 10x2 = 20 so both fractions have 20 on the bottom so they are like this now: 7/20-1/20 = 6/20 simplify by 2: 6/20 divide by 2/2 = 3/10. 3/10 is your answer