What is an expression for the calculation 2/3 times the sum of 2/8 and 4/8?

2/3 ((2/8) + (4/8))

For the 2/8 + 4/8 you wouldn't need the extra set of parentheses, but for I typed it to not confuse you.

So 2/3 times the sum of 2/8 and 4/8. Get the sum of 2/8 and 4/8 (which is

((2/8) + (4/8)) and then add 2/3 outside to parentheses to indicate that you are multiplying them.