So if the bakery is 1/10 of the shopping center's area, and the shopping center's area is 4500 feet, then the bakery's area is 1/10th of 4500 feet. 1/10th of 4500 feet is 450.
A more in-depth explanation:
A fraction is:
x/y
where y would equal how many parts you wanted to split a number into and x would equal how many parts you want to take.
So splitting 4500 into 10 parts and then taking one is basically 1/10 of 4500.
4500 in 10 parts, one would be 450.