My guess is the ratio has been computed from rounded values.

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1. The Neilson 5% dairy creamer nutrition facts sheet says there is 1g of fat per tablespoon (15ml):

[![enter image description here][2]][2]  
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2. The Neilson half and half cream (a.k.a 10% cream) nutrition facts sheet says there is 1.5g of fat per tablespoon:

[![enter image description here][3]][3]  
[![enter image description here][4]][4]

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**1g** fat is **33%** less fat than **1.5g** fat. QED.

On the other hand, the calories ratio is consistent, jumping from 10 (5% MF) to 20 (10% MF).  

  [1]: https://i.sstatic.net/Knuh55aG.png
  [2]: https://i.sstatic.net/pz1k1Gjf.png
  [3]: https://i.sstatic.net/BHOnkmWz.png
  [4]: https://i.sstatic.net/DavtdEC4.png