How many fifths are in 2.8?

To find out how many fifths are in 2.8, we need to divide 2.8 by 1/5. Dividing by a fraction is the same as multiplying by its reciprocal. The reciprocal of 1/5 is 5/1, or just 5.

So, we calculate 2.8 * 5 = 14.

There are $\boxed{14}$ fifths in 2.8.