20 percent can be written as the fraction 1/5. It can also be written as the decimal 0.2. Percentages, fractions and decimals are different ways of expressing the same number value.
To convert from a percentage to a fraction, the percentage first needs to be divided by 100, in order to convert it to a decimal. For example, 20 divided by 100 is 0.2. After that, the decimal is written above the number 1, for example, 0.2/1. This fraction is then converted to remove the decimal by multiplying top and bottom by 10, which results in 2/10. Since 2 and 10 are even numbers, this can be simplified by dividing each number by 2, which results in 1/5.