Final answer:
To find the ratio of x to y, divide both sides of the given ratio by 2. Then, multiply both sides by 2/5 to get the final ratio.
Step-by-step explanation:
The ratio of 2x to 5y is given as 4.
To find the ratio of x to y, we need to simplify the given ratio.
We can first divide both sides of the ratio by 2 to get x to 5/2y is equal to 2.
Next, we can multiply both sides of the ratio by 2/5 to get the final ratio of x to y as 1 to 5/2, which simplifies to 1 to 2.5.