Low Sugar content ??

[jrgagne99]

2% is 43 gallons of sap
1.9% is 45 gallons.
1.7% is 50.5 gallons
1.5% is 57 gallons
1% is 86 gallons
Now if you can get 3% your looking at 28.66 gallons. The difference of 1/2 of a percent can mean hours of boiling for us batch guys.

I thought syrup was 66% sugar content. If you have 2% sap, 66/2=33, so wouldn't the ratio be 33:1 for 2% sap? What's going on here?