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Discover LudwigThe phrase "by a half" is grammatically correct and can be used in written English.
It means to decrease or reduce something by half or 50%. Example: The company's profits increased by a half compared to last year's earnings.
Exact(30)
Tables are separated from the bar by a half wall.
The rate was cut by a half a percentage point.
The Bank of Canada reduced its benchmark rate by a half point yesterday.
In this case, two of its notes are changed by a half step.
Brazil's central bank cut its key interest rate by a half point, to 14.25%.
Worth $12.4 billion in 2002, two-way trade probably grew last year by a half.
Similar(28)
Supplemented by a half-dozen lovely sakes.
Both teams trail Purdue by a half-game.
And then he did 10k, followed by a half-marathon.
It trails first-place Iowa by a half-game.
Add enough water to cover by a half-inch.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com