3 3/4 lb of candy costs $ 20.25
we have been given a mixed fraction with both whole number and fraction
so lets convert it an improper fraction
3 3/4
3 wholes are equivalent to

then 3 3/4 is -

so 15/4 lbs -- $ 20.25
then 1 lb is --

therefore 1 lb is equal to $ 5.40