It is given that 100 pounds of cotton candy were bought.
On day one 21.66 pounds of concrete were sold and on day two 34.57 pounds Of cotton candy were sold.
It is required to find how much cotton candy in pounds was left over to sell on day 3.
To do this, subtract the number of pounds of cotton candy sold from the total number of pounds of cotton candy bought:
[tex]100-34.57=65.43[/tex]The number of pounds of cotton candy left over to sell is 65.43 pounds.