Dorchester works at a puppy wash. He is paid $40 per day + $2.25 for each puppy he washes. On Wednesday, Dorchester earned $76. How many puppies did he wash that day?
First find out how much he earned just from puppy washing: $76 - $40 = $<<76-40=36>>36 for puppy washing
Now divide this amount by the payment per puppy: $36 / $2.25 per puppy = <<36/2.25=16>>16 puppies
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