What is 2/36 plus 7/21? (Answer: 7/18)

Exact Answer

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Problem: What is 2/36 plus 7/21?
Formula / Expression: 2/36 + 7/21
Final Answer: 7/18
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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 7/21 by 12 so both fractions share the common base 252.
Working: 2 × 7/36 × 7 = 14/252 and 7 × 12/21 × 12 = 84/252

Step 3: Add the Numerators
Now add the numerators (14 + 84 = 98) and keep the common denominator 252 unchanged.
Working: 14 + 84/252 = 98/252

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 98 and 252, which is 14. Divide both the numerator and denominator by 14.
Working: 98 ÷ 14/252 ÷ 14 = 7/18

Step 5: Decimal & Percentage Representation
Dividing the numerator 7 by denominator 18 produces a repeating decimal (approximately 0.388889, or 38.8889%).
Working: 7 ÷ 18 = 0.388889 (38.8889%)

Key Values:
- Simplified Fraction: 7/18
- Mixed Number Form: 7/18
- Decimal Value: 0.388889
- Percentage: 38.8889%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-2-36-plus-7-21/
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2/36 + 7/21 = 7/18

Simplified Fraction

7/18

Mixed Number

Proper (7/18)

Decimal Value

0.388889

Percentage

38.8889%

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Step-by-Step Solution: 2/36 + 7/21

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 7/21 by 12 so both fractions share the common base 252.

2 × 7/36 × 7 = 14/252 and 7 × 12/21 × 12 = 84/252

Step 3

Add the Numerators

Now add the numerators (14 + 84 = 98) and keep the common denominator 252 unchanged.

14 + 84/252 = 98/252

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 98 and 252, which is 14. Divide both the numerator and denominator by 14.

98 ÷ 14/252 ÷ 14 = 7/18

Step 5

Decimal & Percentage Representation

Dividing the numerator 7 by denominator 18 produces a repeating decimal (approximately 0.388889, or 38.8889%).

7 ÷ 18 = 0.388889 (38.8889%)

Visual Representation

The diagram below illustrates 2/36 plus 7/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`7/18`
Mixed Number Form	`7/18`
Decimal Form	`0.388889`
Percentage	`38.8889%`

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Frequently Asked Questions

What is 2/36 plus 7/21 as a fraction?

2/36 + 7/21 in simplest fraction form is 7/18.

What is 2/36 plus 7/21 as a decimal?

2/36 + 7/21 converted to a decimal is 0.388889.

What is 2/36 plus 7/21 as a percentage?

2/36 + 7/21 expressed as a percentage is 38.8889%.

Does 2/36 plus 7/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.388889...) because the denominator contains prime factors other than 2 and 5.