What is 9/28 plus 2/3? (Answer: 83/84)

Exact Answer

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Problem: What is 9/28 plus 2/3?
Formula / Expression: 9/28 + 2/3
Final Answer: 83/84
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 28 and 3 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 28 × 3 = 84.
Working: LCD(28, 3) = 84

Step 2: Convert to Equivalent Fractions with Common Denominator 84
Multiply the numerator and denominator of 9/28 by 3, and multiply the numerator and denominator of 2/3 by 28 so both fractions share the common base 84.
Working: 9 × 3/28 × 3 = 27/84 and 2 × 28/3 × 28 = 56/84

Step 3: Add the Numerators
Now add the numerators (27 + 56 = 83) and keep the common denominator 84 unchanged.
Working: 27 + 56/84 = 83/84

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 83 and 84 is 1, confirming that 83/84 cannot be reduced further—it is already in its simplest irreducible form.
Working: 83/84

Step 5: Decimal & Percentage Representation
Dividing the numerator 83 by denominator 84 produces a repeating decimal (approximately 0.988095, or 98.8095%).
Working: 83 ÷ 84 = 0.988095 (98.8095%)

Key Values:
- Simplified Fraction: 83/84
- Mixed Number Form: 83/84
- Decimal Value: 0.988095
- Percentage: 98.8095%

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Solved with FractionsCalc:
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9/28 + 2/3 = 83/84

Simplified Fraction

83/84

Mixed Number

Proper (83/84)

Decimal Value

0.988095

Percentage

98.8095%

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Step-by-Step Solution: 9/28 + 2/3

Step 1

Find the Least Common Denominator (LCD)

The denominators 28 and 3 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 28 × 3 = 84.

LCD(28, 3) = 84

Step 2

Convert to Equivalent Fractions with Common Denominator 84

Multiply the numerator and denominator of 9/28 by 3, and multiply the numerator and denominator of 2/3 by 28 so both fractions share the common base 84.

9 × 3/28 × 3 = 27/84 and 2 × 28/3 × 28 = 56/84

Step 3

Add the Numerators

Now add the numerators (27 + 56 = 83) and keep the common denominator 84 unchanged.

27 + 56/84 = 83/84

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 83 and 84 is 1, confirming that 83/84 cannot be reduced further—it is already in its simplest irreducible form.

83/84

Step 5

Decimal & Percentage Representation

Dividing the numerator 83 by denominator 84 produces a repeating decimal (approximately 0.988095, or 98.8095%).

83 ÷ 84 = 0.988095 (98.8095%)

Visual Representation

The diagram below illustrates 9/28 plus 2/3 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`83/84`
Mixed Number Form	`83/84`
Decimal Form	`0.988095`
Percentage	`98.8095%`

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Frequently Asked Questions

What is 9/28 plus 2/3 as a fraction?

9/28 + 2/3 in simplest fraction form is 83/84.

What is 9/28 plus 2/3 as a decimal?

9/28 + 2/3 converted to a decimal is 0.988095.

What is 9/28 plus 2/3 as a percentage?

9/28 + 2/3 expressed as a percentage is 98.8095%.

Does 9/28 plus 2/3 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.988095...) because the denominator contains prime factors other than 2 and 5.