Perform the following operation. simplify if necessary.
-5/9 + 3/10

F you use 40 as the common denominator, then multiply the first fraction by 4/4 and the 2nd fraction by 5/5 310⋅44−58⋅551240−2540 once you have a common denominator, you add or subtract the tops, and keep the same denominator: 1240−2540=12−2540

Hope i can you!