The phrase "a margin of approximately" is correct and usable in written English.
It can be used when discussing estimates, tolerances, or ranges in various contexts, such as finance, statistics, or measurements.
Example: "The project is expected to be completed within a margin of approximately two weeks."
Alternatives: "an estimate of about" or "a range of roughly".
Bryan lost to McKinley by a margin of approximately 600,000 votes, the greatest electoral sweep in twenty-five years.
Digital enhancement of the "coffee bean poll" ("a relaxing way to have your say") appears to show the Liberals at second place, behind by a margin of approximately 70 beans.
Valentino's EBIT was €206 million, up 14.4% on a yearly basis, and yielding a margin of approximately 18% of total sales.
It appeared as Measure 80 on the ballot, but was defeated by a margin of approximately 53%-47 53%-47
The popular vote was much closer as Nixon edged Humphrey 43.42% to 42.72%, with a margin of approximately 500,000 votes.
■ Choose the person who won the election by a margin of approximately 2.5 million votes, an action that would be both democratic and in keeping with the intent of the Founders.
Previously, it forecast a margin of "around break-even, ranging either above or below by approximately two percentage points".
Using wireless signals reflected off people's bodies, the device measures heartbeats as accurately as an ECG monitor, with a margin of error of approximately 0.3percentt.
The planned and final sample sizes allowed for estimation of response rates with a margin of error of approximately 14% for each baricitinib dose and 10% for placebo.
If the observed coverage were to be 95% on average across the simulations, then 20,000 simulations would from simple binomial theory give a margin of error of approximately, which was considered acceptable.
With a profit margin of approximately 25%, search in 2010 is far more profitable than publishing.
