How do you find the percentage of a whole number?

For example:

4 of the 18 cats in a shelter are black.

How do you find the percentage?

Put it in a decimal form. i think it would be like 20% or around that area.

1 find your whole value and the number you want 2 turn into a % 2 turn the two numbers into a fraction 3 place the # you want to turn into a percentage over the whole value 4 convert the fraction into a decimal 5 multiply the decimal by 100 to get the %