0:00:00.479,0:00:05.515
Let's write 0.8 as a fraction.

0:00:05.515,0:00:10.206
So 0.8, the 8 right over here is in the tenths place.

0:00:10.206,0:00:11.348
It is in the tenths place.

0:00:11.348,0:00:14.337
So you can read this as 8 tenths (or 8/10).

0:00:14.337,0:00:16.048
And we can write that, literally,

0:00:16.048,0:00:21.329
as being equal to 8 tenths, or 8 over 10 (or 8/10).

0:00:21.329,0:00:23.011
And now, we've already written it as a fraction.

0:00:23.011,0:00:25.273
And if we want, we can simplify this down.

0:00:25.273,0:00:27.820
Both 8 and 10 share common factors.

0:00:27.820,0:00:29.940
They are both divisible by 2.

0:00:29.940,0:00:30.965
So let's divide both the numerator

0:00:30.965,0:00:33.960
and the denominator by 2.

0:00:33.960,0:00:35.465
We're not changing the value of the fraction,

0:00:35.465,0:00:37.182
because we are dividing both the numerator

0:00:37.182,0:00:39.068
and the denominator by the same thing.

0:00:39.068,0:00:41.448
8 ÷ 2 is 4.

0:00:41.448,0:00:43.783
10 ÷ 2 is 5.

0:00:43.783,0:00:45.866
And we're done.

0:00:45.866,0:00:52.167
0.8 is the same thing as 8 tenths (or 8/10), which is the same thing as 4 fifths (or 4/5).