You are using 3/4 of a pound of wax, so just multiple your oil 1.75 x .75 and you will get 1.3 oz. If you were using an amount of wax that wasn't such a nice number what I do is divide the amount of oil I use per pound by 16 to find out how much oil per ounce of wax, then multiple by the number of ounces of wax used. For you that would be 1.75/16=.109, then you can just multiple .109 by the number of ounces of wax you are using (.109 x 12= 1.3 rounded down). It's a little easier that way I think, at least for me it is. I hope this helps you and doesn't confuse you more!