The phrase "a considerable decrease in the number" is correct and usable in written English.
You can use it when discussing a significant reduction in quantity or frequency of something, often in statistical or analytical contexts.
Example: "The report indicated a considerable decrease in the number of participants compared to last year."
Alternatives: "a significant reduction in the number" or "a notable decline in the number."
This approach results in a considerable decrease in the number of probabilities to be given by experts.
Then, the equations of boundary and exterior zones are linearized, the algebraic variables and equations of exterior zone are removed and a considerable decrease in the number of power system equations is obtained which is equal to a reduction in the system dimensions.
Applying RSM to arrange experimental layout resulted in a considerable decrease in the number of experiments and also the interactions between parameters were considered.
A considerable decrease in the number of intra-articular infiltrating leukocytes as well as the degree of synovitis in the knee joints was observed.
In phases 3b and 4, regression of the trigeminal placode was indicated by a considerable decrease in the number of focal thickenings, most substantially in its ophthalmic parts.
These vaccines have been successfully used to prevent whopping cough and have contributed to a considerable decrease in the number of cases registered per year [ 76].
The data is not available for Spain, which explains the considerable decrease in the number of cases.
Coomassie staining of these fractions indicated a considerable decrease in protein complexity (Figure S1B).
Although higher pre-lithiation levels of 89.0% contributed to high specific capacitance in early cycling, they allowed a considerable decrease in specific capacitance at higher numbers of cycles.
"There has been a considerable decrease in illegal riding in the Pinelands since we opened up," said Liza Akeret, the park's manager.
Synchronous with expansion, looming stimuli produced a considerable decrease in luminance within the behavioral apparatus.
