First find Devin's new height by adding his growth to the original height: 65 inches + 3 inches = <<65+3=68>>68 inches
Then subtract 66 inches from Devin's height to find how many extra inches of height he has: 68 inches - 66 inches = <<68-66=2>>2 inches
Then multiply the number of extra inches by the percentage increase per inch to find the total percentage increase in his chances: 2 inches * 10%/inch = 20%
Then add the percentage increase to the base percentage to find Devin's overall chance of making the basketball team: 10% + 20% = 30%
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