5/6 -1/2 = 1/3 first you write out the problem then figure out the common denominator ; 12 then see how many times the old denominator goes into the new denominator ; 2 and 6 , then multiply the numerator to get 10 & 6 . subtract 10/12 by 6/12 to get 4/12 then divide. answer it 1/3