13-((4/5)+(6/8)) Make your fractions have common denominators 13-((32/40)+(30/40)) Add your fractions and simplify 13-(62/40) or 13-(31/20) or 13-(1 11/20) Then turn 13 into a fraction with a common denominator! Im going to use the second fraction method (31/20) 13 written as a fraction is 13/1, its LCD with 31/20 is 20. I now multiply the top and bottom by 20 260/20 Now I rewrite the problem again (260/20)-(31/20) Which equals 229/20! This is your unsimplified answer Finally you simplify and get 11 9/20
