To answer your question, I take the amount of wax I use in my container and multiply by the percentage of oil I want to use. Most ppl use 6%, but your 7% should be fine. Most of us tested until we came up with a percentage of oil that worked with our wax and wick. Wax retailers will often tell you how much fragrance the wax will hold, but I would never go that high. . .like 10% for many soy waxes but not all. I use approximately 7.15% oil. My pint canning jar holds 12 ounces so I use 11.2 ounces of wax and .8 ounces of oil. (11.2*.0715=.8 ounces is the way I figure mine)
So having said all that, you really should go back to square one and test, test, test, as others will tell you. Start with wax and wick without fragrance until you find the wick that works as close to perfect start to FINISH (burning all the way down in the container). Gosh, so much information on this forum and people willing to help. You will find many posts with the basics all in one post once you start searching.
Have fun!
GoldieMN