The phrase "a slight decrease in the number" is correct and usable in written English.
It can be used when discussing statistical data or trends that indicate a small reduction in quantity.
Example: "The report showed a slight decrease in the number of participants compared to last year."
Alternatives: "a minor reduction in the count" or "a small drop in the figure."
Over the past 70 years, there has actually been a slight decrease in the number of tropical cyclones, says Fitchett.
More recent statistics show a slight decrease in the number of institutional care facilities: from 269 in 2010 to 228 in 2014.
"There's been a slight decrease in the number of complaints since 2016, but it's an ongoing problem," said Lorelei Salas, the consumer affairs commissioner.
The dependence with increasing Cr content is weak, however, showing only a slight decrease in the number densities.
Australia, which combines remoteness with safe streets, did not benefit so dramatically from its reputation as a haven from terrorism; there was a slight decrease in the number of overseas visitors to Australia last year.
And some judges question whether the pressures of the new system - which have led to an increase in plea bargains and a slight decrease in the number of trials - are in the best interests of justice.
As can be seen from Tables 4 and 5, the applied demand aggregation leads to a slight decrease in the average number of blocks and a slight increase in the average number of sub-lots per block.
According to Lazard's quarterly "Review of Shareholder Activism in 2016" report, there has been a slight decrease in the overall number of activist campaigns in the U.S.
In older mutant fish, there is a slight decrease in the average number of melanophores, likely due to the interruptions of the stripe areas.
Since 2002, there has also been a slight decrease in the statistical average number of children women expect to have, from 2.3 to 2.2, according to the survey of 5,699 women.
After nine months of incubation, a slight decrease in the fractional copy number of the GP degraders has been observed.
