The phrase "declining amount" is correct and usable in written English.
It is often used to describe a decrease in quantity or number over time. Example: Despite efforts to increase sales, the company has seen a declining amount of revenue over the past year.
The declining amount of global ODA ($133bn£85bnbn) in 2011) is outgrown by remittance flows from migrants to developing countries ($327bn in 2011) as well as net equity inflows to developing countries ($571bn in 2010).
But they flourished as the economy boomed, and in 2004 China banned the creation of more courses because of concerns about the declining amount of farmland and water usage.
Rising standards of living and development in China, one of the world's largest consumers of fertilizer, and India are putting increasing pressure on farmers to produce more crops from a declining amount of agricultural land.
He notes TV coverage has got a lot better since he was last able to binge on sport, but bemoans the declining amount of live action on terrestrial channels.
It adds: "Instead of a declining amount being interest free and anything above that being charged at 18.8%, the whole lot will now be 9.9% - and our unauthorised overdraft charges and fees are lower than others.
It prompted Vince Cable, the business secretary, to comment: "It's frustrating that these figures show the declining amount of money going to small businesses from the banks". The BBA data also shows that small businesses in London and the south-east received a smaller proportion of lending than the size of the sector would merit.
Correction ReprintsYet declining amounts of hedging may not be enough to keep the gold price up.
That also means that firms investing in new wells are extracting declining amounts of gas.Meanwhile, demand is soaring.
Declining amounts of coal were mined near Coalville, Ibstock, and Moira until the 1980s, when mining operations ceased.
Records spanning nearly four decades show two-thirds of the country's most popular moths are declining, amounting to about 220 separate species.
From then until spring 2002, the samples contained declining amounts of the varieties associated with diesel exhaust, the researchers said, and by May of that year returned to amounts typical for New York City air.
