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Answer
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Digit Sum = 11
Reduced Digit Sum = 2

↓Steps Explained:↓

Calculate the digit sum of 209

Calculate the reduced digit sum of 209

Digit Sum

Add up 3 digits of 209:

Digit Sum → 2 + 0 + 9 = 11

Since our digit sum > 9:
repeat this process to get the reduced digit sum:
Our new number to evaluate is 11

Add up 2 digits of 11:

Digit Sum → 1 + 1 = 2

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

Final Answer

Digit Sum = 11
Reduced Digit Sum = 2
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