1.5 and there is usually a zero at the very end as a place holder,but it's also usually optional.
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half of a decimal is 0.50
decimal of a half = 0.51/2:= 1 ÷ 2= 0.5 in decimal
0.5 or .5 is 1/2
0.5 is the decimal representation of one-half, or 1/2.
.5 is a decimal. It is also half of 1.