The phrase "alter the proportion" is correct and usable in written English.
It can be used when discussing changes to ratios, quantities, or relationships between different elements in various contexts, such as mathematics, cooking, or design.
Example: "To achieve a more balanced flavor in the dish, we need to alter the proportion of salt to sugar."
Alternatives: "change the ratio" or "adjust the balance".
We found browsing did not alter the proportion of stumps sprouting and sprout density; however, browse pressure varied among the four most abundant species.
Without full details, it is hard to speculate further, but the Budget announcement may suggest a wish either to share the burden across a greater number of banks or to alter the proportion of bank levy paid by UK banks as compared with overseas banks.
This was done to alter the proportion of excess water that becomes recharge or runoff.
For example, the economic incentives of increasing C stocks to meet increased demand for wood for bioenergy [e.g., 23] has the potential to alter the proportion of planted compared to natural-origin stands at a national level.
The omission of the green volume from the multivariate analyses did not alter the proportion of correctly classified patients (76% (3 months) and 78% (1 year)), but slightly decreased the area under the ROC curve (from 0.84 to 0.79).
The time on treatment was not seen to alter the proportion of results in each category (Pearson's chi2, 2df, p = 0.377; table 2).
It's nice, but a bit treacley for my taste, so I decide to alter the proportions to half and half instead.
He would alter the proportions and the mood of the too-tall room by painting the walls a nocturnal hue, a color he called aubergine.
The VRK2 interaction occurs through the C-terminal region of the JIP1 molecule which appears to alter the proportions of MAP kinases associated with JIP1.
AS602868 treatment did also not markedly alter the proportions and total numbers of peripheral CD4+ and CD8+ T cells in the spleen, except for a trend towards decreased total cell numbers of both cell types (Figure S6E).
Fermenting and malting alter the proportions of starch and sugar.
