"tiny decline" is correct and usable in written English.
You can use it when referring to a minor decrease in an amount, size, or quality. For example, "The stock market experienced a tiny decline this week."
A week after a sell-off skimmed froth from bubbly commodities markets, China reported a tiny decline in inflation.
Its GDP suffered a tiny decline at the end of 2007, but it grew at an annualised rate of around 2% in the second quarter of 2008.Europe is struggling to stay above water.
Given the lofty price of the average Janus holding, even a tiny decline in potential growth can undermine the rationale for holding it.
As a result of this buying, the Dow staged an impressive recovery, winding up the day with a tiny decline of just over a point.
Alvin and the Chipmunks: The Squeakquel and Up in the Air experienced tiny declines of 6%and7%7% respectively, while It's Complicated edged down a slim 12%.
With a remarkably tiny 3% decline from the previous weekend, Philomena is the star performer in terms of audience traction.
In China, however, households' investment income is tiny and has declined to only 2% of GDP in 2005, compared with around 15% in America.
The N.H.L.'s historically tiny ratings have declined over the past few years, but so far in the playoffs, they have increased by 17percentt on ESPN to a 0.7 (or 613,633 TV homes) and by 25percentt on ESPN2 to a 0.5 (or 399,845 TV homes).
"At most, file sharing can explain a tiny fraction of this decline," the professors concluded.
Only a tiny fraction of the decline came because fewer people were working; withholding in that period edged down just 1.4percentt.
Although the decline is tiny in percentage terms, less than 1 percent, it marks an important turning point for the country and the global economy, which has come to rely on Chinese workers to assemble its iPhones and stitch its T-shirts.
