What is 8/33 plus 6/21? (Answer: 122/231)

Exact Answer

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Problem: What is 8/33 plus 6/21?
Formula / Expression: 8/33 + 6/21
Final Answer: 122/231
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 33 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 231 (which is smaller than their product 33 × 21 = 693, keeping the calculation simpler).
Working: LCD(33, 21) = 231

Step 2: Convert to Equivalent Fractions with Common Denominator 231
Multiply the numerator and denominator of 8/33 by 7, and multiply the numerator and denominator of 6/21 by 11 so both fractions share the common base 231.
Working: 8 × 7/33 × 7 = 56/231 and 6 × 11/21 × 11 = 66/231

Step 3: Add the Numerators
Now add the numerators (56 + 66 = 122) and keep the common denominator 231 unchanged.
Working: 56 + 66/231 = 122/231

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 122 and 231 is 1, confirming that 122/231 cannot be reduced further—it is already in its simplest irreducible form.
Working: 122/231

Step 5: Decimal & Percentage Representation
Dividing the numerator 122 by denominator 231 produces a repeating decimal (approximately 0.528139, or 52.8139%).
Working: 122 ÷ 231 = 0.528139 (52.8139%)

Key Values:
- Simplified Fraction: 122/231
- Mixed Number Form: 122/231
- Decimal Value: 0.528139
- Percentage: 52.8139%

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Solved with FractionsCalc:
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8/33 + 6/21 = 122/231

Simplified Fraction

122/231

Mixed Number

Proper (122/231)

Decimal Value

0.528139

Percentage

52.8139%

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Step-by-Step Solution: 8/33 + 6/21

Step 1

Find the Least Common Denominator (LCD)

The denominators 33 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 231 (which is smaller than their product 33 × 21 = 693, keeping the calculation simpler).

LCD(33, 21) = 231

Step 2

Convert to Equivalent Fractions with Common Denominator 231

Multiply the numerator and denominator of 8/33 by 7, and multiply the numerator and denominator of 6/21 by 11 so both fractions share the common base 231.

8 × 7/33 × 7 = 56/231 and 6 × 11/21 × 11 = 66/231

Step 3

Add the Numerators

Now add the numerators (56 + 66 = 122) and keep the common denominator 231 unchanged.

56 + 66/231 = 122/231

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 122 and 231 is 1, confirming that 122/231 cannot be reduced further—it is already in its simplest irreducible form.

122/231

Step 5

Decimal & Percentage Representation

Dividing the numerator 122 by denominator 231 produces a repeating decimal (approximately 0.528139, or 52.8139%).

122 ÷ 231 = 0.528139 (52.8139%)

Visual Representation

The diagram below illustrates 8/33 plus 6/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`122/231`
Mixed Number Form	`122/231`
Decimal Form	`0.528139`
Percentage	`52.8139%`

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Frequently Asked Questions

What is 8/33 plus 6/21 as a fraction?

8/33 + 6/21 in simplest fraction form is 122/231.

What is 8/33 plus 6/21 as a decimal?

8/33 + 6/21 converted to a decimal is 0.528139.

What is 8/33 plus 6/21 as a percentage?

8/33 + 6/21 expressed as a percentage is 52.8139%.

Does 8/33 plus 6/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.528139...) because the denominator contains prime factors other than 2 and 5.