What is 13/26 in simplest form and what is 2/18 in simplest form and what is 7/10 in simplest form and what is 6/30 in simplest form and what is 9/12 and what is 40/50 in simplest form and what is 12/14 in simplest form and what is 2/8 in simplest form and what is 18/36 in simplest form and what is 8/9 in simplest form