Final answer:
To write 45% as a fraction in simplest form, divide both the numerator and denominator by their greatest common divisor
Step-by-step explanation:
To write 45% as a fraction in simplest form, we need to express it as a fraction with the denominator as 100. Since a percentage is a part of a whole, we can write 45% as 45/100. However, this fraction can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 5. Therefore, the simplest form of 45% is 9/20.
Learn more about Converting a percentage to a fraction