Final answer:
The portion of the paints that are watercolors or acrylics is represented by the fraction 11/20.
Step-by-step explanation:
To determine the fraction representing the portion of the paints that are watercolors or acrylics, we need to calculate the combined percentage of watercolors and acrylics.
Given that the paint set contains 30% watercolors and 25% acrylics, we can add these percentages together to find the total percentage of watercolors and acrylics: 30% + 25% = 55%.
Therefore, the portion of the paints that are watercolors or acrylics is represented by the fraction 55/100, which can be simplified to 11/20.