What is 2/36 plus 12/21? (Answer: 79/126)

Exact Answer

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Problem: What is 2/36 plus 12/21?
Formula / Expression: 2/36 + 12/21
Final Answer: 79/126
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 36 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 252 (which is smaller than their product 36 × 21 = 756, keeping the calculation simpler).
Working: LCD(36, 21) = 252

Step 2: Convert to Equivalent Fractions with Common Denominator 252
Multiply the numerator and denominator of 2/36 by 7, and multiply the numerator and denominator of 12/21 by 12 so both fractions share the common base 252.
Working: 2 × 7/36 × 7 = 14/252 and 12 × 12/21 × 12 = 144/252

Step 3: Add the Numerators
Now add the numerators (14 + 144 = 158) and keep the common denominator 252 unchanged.
Working: 14 + 144/252 = 158/252

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 158 and 252, which is 2. Divide both the numerator and denominator by 2.
Working: 158 ÷ 2/252 ÷ 2 = 79/126

Step 5: Decimal & Percentage Representation
Dividing the numerator 79 by denominator 126 produces a repeating decimal (approximately 0.626984, or 62.6984%).
Working: 79 ÷ 126 = 0.626984 (62.6984%)

Key Values:
- Simplified Fraction: 79/126
- Mixed Number Form: 79/126
- Decimal Value: 0.626984
- Percentage: 62.6984%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-2-36-plus-12-21/
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2/36 + 12/21 = 79/126

Simplified Fraction

79/126

Mixed Number

Proper (79/126)

Decimal Value

0.626984

Percentage

62.6984%

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Step-by-Step Solution: 2/36 + 12/21

Step 1

Find the Least Common Denominator (LCD)

The denominators 36 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 252 (which is smaller than their product 36 × 21 = 756, keeping the calculation simpler).

LCD(36, 21) = 252

Step 2

Convert to Equivalent Fractions with Common Denominator 252

Multiply the numerator and denominator of 2/36 by 7, and multiply the numerator and denominator of 12/21 by 12 so both fractions share the common base 252.

2 × 7/36 × 7 = 14/252 and 12 × 12/21 × 12 = 144/252

Step 3

Add the Numerators

Now add the numerators (14 + 144 = 158) and keep the common denominator 252 unchanged.

14 + 144/252 = 158/252

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 158 and 252, which is 2. Divide both the numerator and denominator by 2.

158 ÷ 2/252 ÷ 2 = 79/126

Step 5

Decimal & Percentage Representation

Dividing the numerator 79 by denominator 126 produces a repeating decimal (approximately 0.626984, or 62.6984%).

79 ÷ 126 = 0.626984 (62.6984%)

Visual Representation

The diagram below illustrates 2/36 plus 12/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`79/126`
Mixed Number Form	`79/126`
Decimal Form	`0.626984`
Percentage	`62.6984%`

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Frequently Asked Questions

What is 2/36 plus 12/21 as a fraction?

2/36 + 12/21 in simplest fraction form is 79/126.

What is 2/36 plus 12/21 as a decimal?

2/36 + 12/21 converted to a decimal is 0.626984.

What is 2/36 plus 12/21 as a percentage?

2/36 + 12/21 expressed as a percentage is 62.6984%.

Does 2/36 plus 12/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.626984...) because the denominator contains prime factors other than 2 and 5.