Final answer:
To change 15% to a common fraction, divide the percentage value by 100. Then reduce the fraction to lowest terms.
Step-by-step explanation:
To change 15% to a common fraction, we divide the percentage value by 100. So, 15% becomes 15/100. To reduce this fraction to lowest terms, we can simplify it by canceling out the common factors of the numerator and the denominator. In this case, both 15 and 100 are divisible by 5. So, 15/100 simplifies to 3/20.
Learn more about converting percentages to fractions