We have to make that mixed number into proper number by changing into decimal number
Mixed Number:
A mixed number is nothing but the combination of a whole number and a proper fraction
If we have given any side measurement into a mixed number say [tex]1\frac{1}{2}[/tex] unit then we have to change this [tex]\frac{1}{2}[/tex] into decimal value and the total unit value will be 1.5 unit
Now we can put into the formula
area = length x width
Learn more about mixed number here -
https://brainly.com/question/1746829
#SPJ2