The phrase "a margin of almost" is correct and usable in written English.
It can be used when discussing the difference or gap between two quantities, often in contexts like statistics, finance, or competition.
Example: "The candidate won the election by a margin of almost 10,000 votes."
Alternatives: "a difference of nearly" or "a gap of about".
On its maiden voyage, it established records, east & west, against the Queens by a margin of almost 4 knots.
The mayor controls the city council, and he won re-election in 1995 by a margin of almost two to one.
A month later, Quayle's running mate, George H. W. Bush, crushed Michael Dukakis by a margin of almost eight percentage points and carried forty states.
The poll said those voters identify Mr. Obama as the "fairness" candidate, also by a margin of almost 10 percentage points.
The death penalty amendment, which passed by a margin of almost 2 to 1, was later withdrawn to avoid a filibuster against the entire bill.
And São Paulo, the industrial heartland and most populous state of Brazil, rejected the president by a margin of almost two to one.
Moreover, Calderon won in free, transparent and fair elections by a margin of about 240,000 votes out of almost 42 million cast.
The average Ducks' game score is 45.5-25.9 for a margin of victory of almost three touchdowns.
Continuing his unbeaten run in full-distance time trials this season – as opposed to briefer stage-race prologues – Wiggins finished 42sec ahead of the world champion Tony Martin of Germany, a healthy margin of almost a second per kilometre for the 44km distance, with the Tour de France runner-up Chris Froome giving Great Britain a second medal by taking bronze.
But there's currently no reason to mess with a formula that, even in a soft half-year, produced a profit margin of almost 10%.
The Vermont Senator, who took the lead in a national poll for the first time in recent days, was finally vanquished here by a projected margin of almost four per cent.
