The answer is 7 or 7.07. Hope this helps
The answer is 2/3
Explanation
1/3+2/3= 3/3 which is 1
So that would change 1 1/3 to 1 3/3 which is the same as 2.
Multiply $530.40 by 3/4. You get the equation

If you simplify this, you get the solution of $397.80
$397.80