The phrase "a third cheaper than" is correct and usable in written English.
It can be used when comparing the price of one item to another, indicating that one item costs one-third less than the other.
Example: "This model is a third cheaper than the previous version, making it a more affordable option for consumers."
Alternatives: "one-third less expensive than" or "33% cheaper than".
It found that Taiwan's housing was a third cheaper than Japan's, even though Taiwan has almost double the population density.
It found that Taiwan's housing was a third cheaper than Japan's, even though Taiwan's population density is 90% higher.
All things being equal, plasma televisions are about two-thirds the price of their LCD equivalents, which are themselves up to a third cheaper than LED sets.
The company has promised that its machine could do the job at $1,000 a day, at least a third cheaper than what Illumina has announced.
Tax breaks will soon make locally built tablet computers a third cheaper than imports, leading Foxconn to set up a Brazilian plant to make iPads.
Known in Benin as kpayo, it is a third cheaper than the legal stuff; 80% of the petrol in Benin's cars is said to have been smuggled in.
The result: some branded drugs are at least a third cheaper in Canada than in the United States.
Tickets for the five Rufus Wainwright evenings, which begin on 18 July 2011, will range from £25 to £100 – more than twice as expensive at the bottom end, and about a third cheaper at the top end, than the seat prices for opera.
A British employee produces a fifth less than a French one, but he or she is more than a third cheaper to hire.For firms, this is wonderful.
A study from Kyrgyzstan showed that unpacked salt is up to one third cheaper than packed salt [ 48].
That would be priced at 41.75 percent APR over a period upwards of six months, which Garg said is anything up to one-third cheaper than "nearly every consumer finance company in the market" and on-par with credit card holders.
