30/78 is equal to 38.46%. This percentage tells you how much of a whole the fraction represents in a familiar form. It’s a quick way to see the size of the fraction at a glance.
The fraction 30/78 can be simplified by dividing both the numerator and the denominator by their greatest common divisor, which is 6. That gives you 5/13, a simpler form that’s easier to work with in calculations or comparisons.
Both the simplified fraction (5/13) and the percentage (38.46%) describe the same quantity. Using either format depends on what’s most useful for the situation—fractions for exact ratios, percentages for everyday estimates.