Answer:
Kelvin should have subtracted $18.39 from $30.65 to find the marked down price. He could also have multiplied the original cost by 40% to find the sale price of $12.26.
that is the exacted answer lol.
Kelvin wrote 60 the wrong way.
He has to write $30.65 - 60%, not 0.60.
Here is the final correct equation:
$30.65 - 60% = 12.26
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