Final answer:
The ratio of purple flowers to white flowers, with 669 purple flowers and 221 white flowers, is in its simplest form as 669:221.
Step-by-step explanation:
To find the ratio of purple flowers to white flowers when there are 669 purple flowers and 221 white flowers, we can write this as a fraction and simplify. The ratio is 669 purple flowers to 221 white flowers, which can be written as 669:221. We can simplify this ratio by finding the greatest common divisor of both numbers and dividing both sides of the ratio by that number to find the simplest form. However, since 669 and 221 are both prime numbers, the ratio is already in its simplest form and is 669:221.
Therefore, the ratio of purple flowers to white flowers is 669:221.