Do you mean four fifth's? If so,there are two fives in ten and so, if heading wfor i decimal place, half the nominator (in this case four) which equals two so the answer will most likely to be 0.2.
Hope it helped you . x :)
EDIT: 4/5 as a decimal is 0.8 !
0.8 is four fifths as a decimal.If you mean four fifths then 4/5 as a decimal is 0.8
Expressed as a decimal, four fifths is equal to 0.8.
7.8 is the decimal equivalent of seven and four fifths.
4.8
0.8
4.4
1.8.
0.8
10.8
17.8
1.80
5.8