Incorrect, there is no ratio unfortunately. The reason for this is because when you harvest your crop there is no certain that 70% of the crop is moisture, if you used this method you could be overdrying wasting time ot worse under drying leaving moisture in buds that can turn into mold. Also smoking water vapor isnt good and makes for a terrible smoke in most cases. If you overdry bud, the safest way to moisten it back to avoid a harsh taste is to wrap it in lettuce.
Before you harvest you should not fertilize for at least 3 waterings additionally, you should not water 3-6 days before harvest. (depending on how quickly medium dries out. To ensure a good dry bud... hang buds upside down without major foliage removal for approximately a week until the buds feel crisp around the outside, do a better trimming, then place into containers without lids turning nugs frequently, at this point you will want to wait until the twig snaps.
Before you harvest you should not fertilize for at least 3 waterings additionally, you should not water 3-6 days before harvest. (depending on how quickly medium dries out. To ensure a good dry bud... hang buds upside down without major foliage removal for approximately a week until the buds feel crisp around the outside, do a better trimming, then place into containers without lids turning nugs frequently, at this point you will want to wait until the twig snaps.