What's the sum of 2⁄5 and 2⁄4?
2/5 + 2/4...cannot add/subtract fractions unless they have a common denominator. The common denominator for 4 and 5 is 20.8/20 + 10/20 = 18/20 reduces to 9/10
18\20 because if you times 2/5 by 2/4= 8/20+10/20=18/20