30/80 as a percentage is 37.50%. This value is the decimal representation of the fraction turned into a percent and rounded to two decimal places. It tells you that the fraction is a little less than four‑tenths of a whole.
The fraction 30/80 can also be simplified to 3/8, which is a common fraction you might see in recipes or measurements. Both forms represent the same portion of a whole, just expressed differently.
Knowing the percentage helps when you need to compare it to other values that are already in percent form, like test scores or interest rates. It’s a quick way to see that 30 out of 80 is just under 40 percent.