What is 87/24 over 25 and 224/7 over 10 and 68/49 over 50

If I'm understanding you right, you are asking (87/24)/25. If you don't have a calculator and want to keep this in fraction form, there is this cool trick you can use to simplify this. Look at the problem as (87/24)/(25/1). [25/1 is the same thing as 25]. Now multiply the top number the first fraction by the bottom number of the second fraction (87x1). Then multiply the bottom number of the first fraction by the top number of the second fraction (24x25). Your new fraction is now (87x1)/(24x25). Once you multiply the numbers out, your answer is 87/600. If you are able to solve in decimals, your answer will be approximately 0.15. You can use this method for the other two problems.