typically cbd to thc ratios are stated in a 1:2, 1.5:2, 3:1, etc
typically when you see thc(a) or cbd(a) stated in a %, it is a percent of the mass of the sample, ie 1/10 g bud or oil desolved into (in my case) 40 ml methanol to bring the sample to the same dilution as the cannabinoid standand (restek #34014..1000ug/ml) so that the chromatograph can determine the amount of cannabinoid in the test sample
in my case, the test sample that is injected in to the gc is 1ul, that is 1 millionth of a liter, so i normally will run five tests,toss the high and the low and average the 3 middle results
re different labs getting different results.. sloppiness,differences in moisture content,trichomes lost,etc
thc(a) decarboxylates into thc when you smoke it but not at 100% so tests always show a higher percent of thc(a) than the actual thc you consume
hplc results typically show thc(a)
gc normally use a flame ionization detector which will decarboxylate the thc(a) into thc and the results are always a lower percentage number for a sample of the same material
bubble hash will test at 30%-60% normally depending on quality
with all that said
imo, those numbers were an attempt to defraud the consumer
fwiw