Multiply. simplify your answer and write it as a proper fraction or as a whole or mixed number.
1/2 × 9 =

1/2 x 9 
9 can also be expressed as 9/1 and when we multiply fractions, the numerators and denominators are simply multiplied, easy as that 
1/2 x 9/1 
9/2 is your answer, which can also be written as 4 and 1/2 or 4.5