How do you multiply a decimal by a fraction

In order to multiply a fraction and a decimal, you have to either change the fraction to a decimal or change the decimal to a fraction then multiply ... for example

1/2 *.8 =

we can change 1/2 to a decimal by doing the division that is described by the fraction ... the fraction bar literally means "divided by", so 1/2 means 1 : 2 =.5

Now you can multiply

.8 *.5 =.40 or. 4

The other choice would be to convert. 8 into a fraction. Look at the place value ... the 8 is in the 10ths place so the value is 8 tenths or 8/10. Now multiply

8/10 * 1/2 = 8/20 = 4/5