"a decent example" is correct and can be used in written English.
For example, you could use it in a sentence such as "This is a decent example of how to solve the problem."
Seems to be a decent example of the hangover brunch classic.
Full-size wheels are rare on folders and can be seen to be of limited value, but the Montague Paratrooper is a decent example of the breed.
Nor do senior scientists, who are rarely punished for fraud, set a decent example to their juniors.The implications of widespread academic misconduct could be great.
"Crossover" is a decent example of Sidekick Cinema: a movie to glance up at from time to time while you download ring tones or text-message your friends.
Goethe's famous deathbed invocation, pressed back into service so that the children of P.S. 6 could begin to sense why Americans have a responsibility to set a decent example — the quiet quotation is typical of Howells's subtlety and of his sheer heroic persistence as a writer determined to use all the resources of a poetic imagination to put American life into the light of common experience.
This is a decent example of that work. .
As a science fiction movie fan, I can't help but feel a little disappointed that what might prove to be a rather decent example of the form is being overshadowed by the controversy surrounding Card.
Valdobbiadene Prosecco Spumante Superiore NV (£7.49, Aldi) While this is a perfectly decent example of the big-foam and pear-drop character of cheaper prosecco, its price also means it's the one I'd choose for mixing with Campari or Aperol for a homemade spritz, or with pureed white peaches for a bellini.
Tyler Foster of DVD Talk called it "a pretty decent example of all the notes the show can hit".
"Server", "MC_Server", and "Minecraft_Server" are all decent examples of possible folder names.
Even so, I only know of a few decent examples: Dell has been using Twitter to move incremental equipment and has apparently had good success.
