The phrase "and a small decrease" is correct and usable in written English.
It can be used when discussing changes in data, statistics, or trends, particularly when referring to a minor reduction in a quantity or value.
Example: "The report indicated an increase in sales for the quarter, along with a small decrease in customer complaints."
Alternatives: "and a slight decline" or "and a minor reduction".
In 2007 there was an increase in the birthrate and a small decrease in the death rate.
An increase of the methane selectivity and a small decrease of the growth factor also accompanied these changes.
Accuracy of the spatial rotation task (Table 4) showed a small overall improvement in the active nicotine nasal spray session and a small decrease in the placebo session with a significant drug effect (p =.037).
This echoed a Swedish study published in the New England Journal of Medicine showing a small increase in heart attacks after the start of Daylight Saving Time and a small decrease at its end.
Compared to a voter turnout of 1,160 votes last year, 1,083 votes were cast this year, with a general increase in freshman participation and a small decrease in upperclassman participation.
Membrane swelling decreased with cross-linking time, accompanied by an improvement in mechanical properties and a small decrease in proton conductivity due to the reduced water absorption.
Generally all those fish species which live in fast flowing and oxygen rich streams (e.g. Salmonids) need high quantities of oxygen, and only a small decrease of dissolved oxygen can cause losses.
Reducing the gap resistance by increasing gap conductance (conductive gap MD (CGMD)), leads to an increase in ε through an increase in NTU, and only a small decrease in η, resulting in about two times higher overall GOR.
Using extensive data on local news programming and ratings, we find that the ownership change led to 1) substantial increases in coverage of national politics at the expense of local politics, 2) a significant rightward shift in the ideological slant of coverage and 3) a small decrease in viewership, all relative to the changes at other news programs airing in the same media markets.
No change in the photoluminescence decay behavior was detected for 2.8-nm NCs, and only a small decrease in the shorter component of the decay was observed for 3.3-nm NCs (indicated by an arrow).
Conversely, there was no congruent release of arsenic during the first month of incubation with experiment CP5 with FR, and even a small decrease of aqueous As concentration in experiment AD5.
