What is the value of the expression below?

- 8/15 + ( - 3/10) + 8/15 + 10/3

A) 0

B) 13/10

C) 91/30

D) 109/30

The answer is C) 91/30

This is how it is done: you will have to find common number and equalize the denominators I mean the common number of 3, 10 and 15 is 30. So when you multiply the denominator with a number you will have to multiply the numerator to the same number for example : - 8/15 (you will multiply it by 2 to get 30 for the denominator) so it becomes - 16/30. And then you equalize the rest and do the operations simply but you won't add or subtract the denominators you will only add and subtract the numerators (don't make mistakes in multiplication cuz it's different). Let me know if you want any additional information And i will do my best