i am currently working on my math hw on Add/subtracting fractions and Mixed Numbers. I am stuck on a problem and I am really confused when I used a math app too solve it for me, but I can't figure out how it got the answer. The answer it gave me is -8. the problem is : ( -3 3/5) -4 2/5 I tried solving this way : I multiplied the the denominator(5) with -3 giving me 15 which I add the 3 from the numerator. I do the same with the other fraction. Multiply 5x4+2 giving me 22. This is where im stuck at. I have this down : 18/5 - 22/5 = -4/5  Again, the math app I used gave me the answer, -8

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