FA usually has around the same percentages, but some might rock. I switched to drops. I start with 2 drops, give it a test. If i taste nothing I add another 2 and so on. Till I get it right. It might be longer then going for a "correct" percentage instantly. But not enough flavor to start with is better then having too much from the start. Also you might like 4% while someone else wants 6%. But FA usually is around 5%