Okay, so don't worry about the whole number, 3, just yet. What you do is find a common denominator for the two fractions. You don't need to change 2/6, but you need to change 2/3 because you can multiply the bottom by 2 to equal 6 which gives you a common denominator. So you multiply 2/3 by two on both bottom and top, and you get 4/6. Now, you can subtract 2/6-4/6. You may have noticed a problem. You get a negative if you subtract the top. Here's how you fix that: Take that whole number, 3, and use it to make 2/6 an improper fraction. Here's how you do that: Take 3, multiply it by the denominator, 6, to get 18, then add the numerator, but keep the denominator. So you have 20/6 now, instead of 2/6, and you can subtract now and not get a negative number. Get that? Okay, so now you have 20/6-4/6. the denominator does not change, so you are only subtracting the top. 20-4=16, so now you have 16/6. You can reduce that by diving both bottom and top by 2, and get 8/3. Now you need to make it a mixed fraction. You do this by dividing the bottom into top. 8 divided by 3 is 2, with 2 left over. You put that 2 over the denominator, 3, so your final answer is 3 and 2/3.
do 20.50 minus 13.50 but you can just take out the .50 because both sides have them and they will cancel out anyways then its just 20 minus 13 and that is 7.
