how do do this

11 and 5 are numerators

6 and 12 are denominators

find the lcm of 6 and 12. LCM of 6, 12 = 12 (12*1 = 12, 6*2 = 12)

Convert 5/6 to 5/12, then multiply 5 by 2 also: 10/12

11/12 - 10/12 = 1/12

Well explained, Obscure......!!!!!