What is 3/21 plus 9/62? (Answer: 125/434)

Exact Answer

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Problem: What is 3/21 plus 9/62?
Formula / Expression: 3/21 + 9/62
Final Answer: 125/434
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 21 and 62 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 21 × 62 = 1302.
Working: LCD(21, 62) = 1302

Step 2: Convert to Equivalent Fractions with Common Denominator 1302
Multiply the numerator and denominator of 3/21 by 62, and multiply the numerator and denominator of 9/62 by 21 so both fractions share the common base 1302.
Working: 3 × 62/21 × 62 = 186/1302 and 9 × 21/62 × 21 = 189/1302

Step 3: Add the Numerators
Now add the numerators (186 + 189 = 375) and keep the common denominator 1302 unchanged.
Working: 186 + 189/1302 = 375/1302

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 375 and 1302, which is 3. Divide both the numerator and denominator by 3.
Working: 375 ÷ 3/1302 ÷ 3 = 125/434

Step 5: Decimal & Percentage Representation
Dividing the numerator 125 by denominator 434 produces a repeating decimal (approximately 0.288018, or 28.8018%).
Working: 125 ÷ 434 = 0.288018 (28.8018%)

Key Values:
- Simplified Fraction: 125/434
- Mixed Number Form: 125/434
- Decimal Value: 0.288018
- Percentage: 28.8018%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-3-21-plus-9-62/
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3/21 + 9/62 = 125/434

Simplified Fraction

125/434

Mixed Number

Proper (125/434)

Decimal Value

0.288018

Percentage

28.8018%

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Step-by-Step Solution: 3/21 + 9/62

Step 1

Find the Least Common Denominator (LCD)

The denominators 21 and 62 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 21 × 62 = 1302.

LCD(21, 62) = 1302

Step 2

Convert to Equivalent Fractions with Common Denominator 1302

Multiply the numerator and denominator of 3/21 by 62, and multiply the numerator and denominator of 9/62 by 21 so both fractions share the common base 1302.

3 × 62/21 × 62 = 186/1302 and 9 × 21/62 × 21 = 189/1302

Step 3

Add the Numerators

Now add the numerators (186 + 189 = 375) and keep the common denominator 1302 unchanged.

186 + 189/1302 = 375/1302

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 375 and 1302, which is 3. Divide both the numerator and denominator by 3.

375 ÷ 3/1302 ÷ 3 = 125/434

Step 5

Decimal & Percentage Representation

Dividing the numerator 125 by denominator 434 produces a repeating decimal (approximately 0.288018, or 28.8018%).

125 ÷ 434 = 0.288018 (28.8018%)

Visual Representation

The diagram below illustrates 3/21 plus 9/62 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`125/434`
Mixed Number Form	`125/434`
Decimal Form	`0.288018`
Percentage	`28.8018%`

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Frequently Asked Questions

What is 3/21 plus 9/62 as a fraction?

3/21 + 9/62 in simplest fraction form is 125/434.

What is 3/21 plus 9/62 as a decimal?

3/21 + 9/62 converted to a decimal is 0.288018.

What is 3/21 plus 9/62 as a percentage?

3/21 + 9/62 expressed as a percentage is 28.8018%.

Does 3/21 plus 9/62 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.288018...) because the denominator contains prime factors other than 2 and 5.