1:0,25 0,6:0,15

To calculate the value of the given expression, we need to multiply the two numbers together.

The expression given is:

(1/0.25) * (0.6/0.15)

Let's simplify each fraction first:

1/0.25 = 4 0.6/0.15 = 4

Now we can multiply the simplified fractions:

4 * 4 = 16

Therefore, the value of the given expression is 16.