Answer:
You need to make the denominators the same.
Explanation:
-2/3 + 3/5 has a common denominator of 15 if you multiply the denominators together, but you must multiply the upper half too.
-2/3 + 3/5 =
-10/15 + 9/15
(= 9/15 - 10/15)
= -1/15
Step-by-step explanation: get a common Denominator of 15
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