[Salchester]

Hi,

Using JavaScript, how do I subtract a weight from a drop-down menu from another drop-down menu, to calculate the amount of weight loss?
In total there should be 6 drop-down boxes, these are the following:

1: Pounds (Before), 2. Ounces (Before), 3. Fraction (Before), 4. Pounds (After), 5. Ounces (After), & 6. Fraction (After)

For example if:

Drop-Down Box 1 = 5
Drop-Down Box 2 = 3
Drop-Down Box 3 = ¾

Drop-Down Box 4 = 3
Drop-Down Box 5 = 2
Drop-Down Box 6 = ¼

Answer = 2.1½ have been lost.