A bulk warehouse is offering 48 cans of sparkling water for $12.00 a case.  The local grocery store is offering the same sparkling water for $6.00 and it only has 12 cans.  How much more expensive, per can, in cents, is this deal at the grocery store?
The bulk warehouse has 48 cans for $12.00 so that's 12/48 = $0.25 a can
The local grocery store has 12 cans for $6.00 so that's 6/12 = $0.50 a can
The grocery store offer is $0.50 a can and the warehouse is $0.25 a can so the grocery store is .50-.25 = $<<0.50-.25=0.25>>0.25 more expensive per can
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