The phrase "a reduction of one" is correct and usable in written English.
It can be used in contexts where you are describing a decrease or lowering of a quantity by one unit.
Example: "The final score reflects a reduction of one from the previous tally."
Alternatives: "a decrease of one" or "a drop of one".
The amount was equivalent to estimates of what Mr. Conrad saved through a reduction of one point on a $1.07 million mortgage.
38 Reductions in pain intensity between10%and20%20% represent a minimal clinically meaningful change and a reduction of one point on the interference scale has been recommended as a clinically meaningful change among people with chronic pain.
Having a Charlson Comorbidity Index of 3 or more nearly quadrupled the odds of having 4 or more admissions, and a reduction of one point on the Dukes network score increased the odds of being a very frequent admitter by 35%.
Partial responders were defined as those with a reduction of one NCI grade of diarrhoea on treatment.
Identification of interventions that can reduce the need for inpatient care, even by a small reduction in length of stay, will have a large impact on the resources absorbed by this group (a reduction of one week in the mean length of stay on an inpatient rehabilitation ward represents a cost efficiency of around 2% of the annual budget).
Patients who experienced any DLT were delayed by 1-week intervals until recovery and could continue on study drug with a reduction of one dose level.
A reduction of one-fifth might seem like nothing to write a column about.
Some economists are predicting a reduction of one-half a percentage point, while others are calling for a more hefty cut of three-quarters to a full percentage point.
Forty percent of subjects showed reduction of two steps or more of vitreous haze (four in each group), and 60% showed a reduction of one-step vitreous haze (seven in group 1 and five in group 2).
At month 6, 8 subjects (40%) showed a reduction of two steps or more of vitreous haze (four in each group), and 12 subjects (60%) showed either no change or a reduction of one-step vitreous haze (seven in group 1 and five in group 2).
In January 1960, Khrushchev took advantage of improved relations with the U.S. to order a reduction of one-third in the size of Soviet armed forces, alleging that advanced weapons would make up for the lost troops.
