The fraction 4⁄30 as a percentage is 13.33%. This number tells you how much of a whole 4 parts out of 30 represent when you look at it on a scale of 100.
If you simplify 4⁄30, you get 2⁄15, which is still the same portion of a whole. Whether you write it as a fraction, a decimal, or a percentage, the value stays the same; the percentage just makes it easier to compare with other numbers that are also out of 100.
Percentages like 13.33% are useful in everyday situations, such as figuring out discounts, test scores, or how much of a budget is spent on a particular item. Knowing the percentage helps you quickly understand the size of a part relative to the whole.
