We have
1 spice rack ----- 6 shelves
1 shelf ---- 15 spice jar
First, we need to know the number of shelves, so we will divide 2250 between 15
[tex]\frac{2250}{15}=150[/tex]We will need 150 shelves for 2250 spice jars
Then we need to know the number of spice racks, so we need to divide 150 between 6
[tex]\frac{150}{6}=25[/tex]We will need 25 spice racks for 2250 spice jars