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

To start, let's simplify the given expressions.

1:0.25 = 1 divided by 0.25, which is equal to 4.

0.6:0.15 = 0.6 divided by 0.15, which is equal to 4.

So, the simplified versions of the given expressions are:

1:0.25 = 4

0.6:0.15 = 4