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Answer
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Digit Sum = 7
Reduced Digit Sum = 7

↓Steps Explained:↓

Calculate the digit sum of 403

Calculate the reduced digit sum of 403

Digit Sum

Add up 3 digits of 403:

Digit Sum → 4 + 0 + 3 = 7

Since our digit sum ≤ 9:
we have our reduced digit sum

Final Answer

Digit Sum = 7
Reduced Digit Sum = 7
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