Hello There!
Your answer to this equation will be -22/15
To get this answer you must find Common Denominators (CD)
3: 3,6,9,12,15
5: 5,10,15
CD = 15
Next you must do cross butterfly
-2/3 and -4/5
-2*5= -10
-4*3= -12
Your new problem should be: -10/15 + -12/15
Now Add -10/15 + -12/15
-10 + -12/15 = -22/15
Get your answer: -22/15 or in decimal form answer: -1.466667
Hope This Helps!