The phrase "allowed to reduce the number of" is correct and usable in written English.
It can be used in contexts where permission or authorization is given to decrease a quantity or amount of something.
Example: "The committee is allowed to reduce the number of participants in the event if necessary."
Alternatives: "permitted to decrease the number of" or "authorized to lessen the number of".
A new strategy, based on the use of a series of two-level saturated designs, allowed to reduce the number of trials without compromising the quality of the achieved results.
But under a deal reached by automakers, the Obama administration and two senior California Air Resources Board officials, manufacturers that exceed new federal fuel-efficiency standards, even slightly, will be allowed to reduce the number of zero-emission vehicles they sell by up to 50 percent in 2018, a reduction that will drop to 30 percent by 2021.
The single-event concept together with thermodynamic constraints allowed to reduce the number of adjustable parameters to 33, from which only 2 activation energies for (s,p) and (t,p) alkylation/cracking, 6 alkene protonation heats, the total concentration of aromatic hydrocarbon pool and the stability difference between secondary and primary carbenium ion had to be determined by regression.
Moreover, our protocol had low drug-related costs and allowed to reduce the number of health care workers necessary to perform the procedure.
A different approach followed by compressed sensing methods allows to reduce the number of coefficients while retaining the modeling properties.
This coding information allowed us to reduce the number of ambiguities for DQA1 typing.
This technique has allowed them to reduce the number of mutations in PCR products and reduce errors [90].
This allowed us to reduce the number of effective candidate regions that needed to be evaluated in our subsequent analysis.
However, 2 important technical innovations allowed us to reduce the number of biopsied cells to 1 per embryo.
The infusion allows doctors to reduce the number of powerful anti-rejection drugs they use from three to one.
It said growth in fund values would also allow it to reduce the number of with-profit policies that are subject to punishing exit fees.
