6 1/2 - 9/10 first convert mixed number to improper 2x6+1 = 13 13/2 - 9/10 next, find a common multiple for denominator we will chose 10 so 65/10 - 9/10 subtract the numerators 54/10 divide numerator and denominator by 2 27/5 This is the fraction in its simplest form 27/5