# Ambiguous comparison between percentage values

English is not my mother tongue. The question is whether the phrase "half as fast" is grammatical, frequent and unambiguous.

When googling, I've found out that the structure "verb + half as fast as" is frequent. But the search results for "verb + half as fast" are not convincing.

In January the growth of corporate loans was __%. In December the growth of corporate loans was half as fast, and the corporate loans in total increased by 5.6%. (by means addition or subtraction, half as fast means twice as slow).

Half as fast is relating to the growth (the rate of the increase). The percentage value 5.6 is relating to the increase in the corporate loans. The increase is equal to 5.6%. The rate of the increase in December is half as fast as the value measured in January.

• Is there a question? Jul 6, 2015 at 14:09
• Sorry for incorrect formulation. I edited the question. Jul 6, 2015 at 14:34
• If 5.6% represented a "half as fast" increase, then the original would have to be 11.2%. Half as fast means at a rate half the original comparator. Twice as fast would mean double the rate or, in this case, 22.4%. Jul 6, 2015 at 14:48
• @Robusto I edited the question. Jul 6, 2015 at 17:53