21/54 as a percentage is 38.89%. This value is rounded to the nearest two decimal places, making it easy to read and compare with other percentages you might encounter.
The fraction 21/54 can be simplified to 7/18, which is roughly 0.389 when expressed as a decimal. Seeing it as a percentage helps put the size of the fraction into everyday language—just under 40 % of a whole.
In practical terms, 38.89% might represent a portion of a budget, a test score, or any situation where you need to understand part of a total. Knowing the percentage quickly tells you that the amount is a little less than two‑fifths of the whole.