What percentage of cumulative retention is typically recorded for accuracy?

In aggregate testing and recording, the percentage of cumulative retention is often recorded to the nearest tenth of a percent. This level of precision is essential because it ensures that the data accurately reflects the material's characteristics in a way that is meaningful for engineering and construction purposes. Recording cumulative retention at this precision allows for a more detailed understanding of the gradation of aggregates, which is crucial for achieving desired properties in mix design, performance, and workability of concrete or asphalt mixtures.

Although other options might give different levels of precision, only recording to the nearest tenth of a percent strikes a balance between providing enough detail for effective analysis while still being manageable in terms of data handling and communication within the industry. This level of specificity is commonly accepted as a standard in practice guidelines and helps in maintaining consistency across various projects and agencies.