The phrase "amounts to a drop" is correct and usable in written English.
It can be used to indicate that something is insignificant or minimal in comparison to a larger context or quantity.
Example: "The funding we received amounts to a drop in the ocean compared to the total costs of the project."
Alternatives: "is just a fraction" or "is merely a small part".
While the news was welcomed, it amounts to a drop in the ocean as 66,000 unaccompanied children illegally crossed into the US this past year.
That's a great start, but 25 gallons barely amounts to a drop in the bucket when it comes to a drought like California is experiencing.
But the savings amounts to a drop in the bucket compared to what agriculture uses.
Employees are expected to practise wage restraint, which effectively amounts to a drop in real incomes.
But analysts say that the pledges amount to a drop in the ocean compared to Venezuela's desperate needs.
The darkening is greatest for blue light, amounting to a drop of as much as 90 percent from the Sun's photosphere to its outer atmospheric regions.
These accounts, whose unused balances amount to a drop in the bucket of the health economy, assist people in financing uncompensated care outside of an acute episode.
On an annualized basis, economists said, the 1.5percentt decline in output would amount to a drop of roughly 6percentt — a significantly bigger fall than the 3.8percentt annual rate of contraction in the United States during the fourth quarter.
The Starr Foundation of New York has been selling off its large holdings of A.I.G. stock since Mr. Greenberg's departure, Ms. Davis said, and its two million shares now amount to "a drop in the bucket" compared with diversified assets of approximately $1.25 billion.
The strong price signal did however result in a 33% reduction in tax revenue from VRT, in financial terms amounting to a drop of €166 million compared to a baseline situation.
Issues of merit aside, "The New Guard" amounted to a drop in a wide ocean; Billy Pidgeon, an analyst for the Internet research firm Jupiter Media Metrix, estimates that "hundreds if not thousands of people are picking up cameras and trying to become digital filmmakers".
