To find the eighteenths make the denominator equal 18. To do this multiple 9 by 2 to get 18. Then you must multiply the numerator as well, and 7 times 2 equals 14. Therefore 14 is the correct answer.
7/9= something over eighteen what ever we do to the bottom number we do to top number. 9×2=18 for the bottom and the top will be ×2 SINCE we ×2to the bottom so therefore we will get =14/18
