What is 80% as a fraction?

80% as a fraction is 4/5.

To convert a percentage to a fraction, you start by writing the percentage as a fraction over 100. So, 80% becomes 80/100. Next, you need to simplify this fraction by finding the greatest common divisor (GCD) of the numerator (80) and the denominator (100). The GCD of 80 and 100 is 20.

Now, divide both the numerator and the denominator by their GCD. So, 80 ÷ 20 = 4 and 100 ÷ 20 = 5. This simplifies the fraction to 4/5. Therefore, 80% is equivalent to the fraction 4/5.

Understanding how to convert percentages to fractions is a useful skill in GCSE Maths, as it helps in various topics such as probability, ratios, and proportions. Remember, the key steps are to write the percentage as a fraction over 100 and then simplify it by dividing both the numerator and the denominator by their greatest common divisor. This method ensures you get the simplest form of the fraction, making it easier to work with in calculations and problem-solving.