It is: 2/4 = 0.5
When you write the decimal number '7' in Base-2 (binary), you write '0111'.
The answer depends on the what the decimal is, for example 0.5 = 2 quarters.
.2
4
0.2
It is 50 cents.
To write 4.2 as a decimal, you simply write it as it is. The number 4.2 is already in decimal form. In decimal notation, the whole number part (4) is followed by a decimal point, then the fractional part (2) which represents two tenths. So, 4.2 is the decimal representation of the number four and two tenths.
1/2 as a decimal number is written as 0.5 (equivalent to 5/10, which clearly reduces to 1/2)
Write the number in front of the decimal point as an integer; then convert the remaining decimal to a fraction: 2 75/100
2.75
0.5
6.4