4/100 of which is 0.8

To find out what fraction of a number a certain value represents, you can set up a simple proportion.

In this case, we want to find out what fraction of a number is represented by 0.8. Let's call the number x.

We can set up the following proportion:

0.8 / x = 4/100

To solve this proportion, cross multiply:

(0.8) * (100) = (4) * (x)

80 = 4x

Now, divide both sides of the equation by 4 to isolate x:

80/4 = x

x = 20

So, 4/100 of 20 is equal to 0.8.

4/100 x = 0.8

x = 0.8 * 100/4