What is 18/44 plus 10/21? (Answer: 409/462)

Exact Answer

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Problem: What is 18/44 plus 10/21?
Formula / Expression: 18/44 + 10/21
Final Answer: 409/462
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 44 and 21 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 44 × 21 = 924.
Working: LCD(44, 21) = 924

Step 2: Convert to Equivalent Fractions with Common Denominator 924
Multiply the numerator and denominator of 18/44 by 21, and multiply the numerator and denominator of 10/21 by 44 so both fractions share the common base 924.
Working: 18 × 21/44 × 21 = 378/924 and 10 × 44/21 × 44 = 440/924

Step 3: Add the Numerators
Now add the numerators (378 + 440 = 818) and keep the common denominator 924 unchanged.
Working: 378 + 440/924 = 818/924

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 818 and 924, which is 2. Divide both the numerator and denominator by 2.
Working: 818 ÷ 2/924 ÷ 2 = 409/462

Step 5: Decimal & Percentage Representation
Dividing the numerator 409 by denominator 462 produces a repeating decimal (approximately 0.885281, or 88.5281%).
Working: 409 ÷ 462 = 0.885281 (88.5281%)

Key Values:
- Simplified Fraction: 409/462
- Mixed Number Form: 409/462
- Decimal Value: 0.885281
- Percentage: 88.5281%

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Solved with FractionsCalc:
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18/44 + 10/21 = 409/462

Simplified Fraction

409/462

Mixed Number

Proper (409/462)

Decimal Value

0.885281

Percentage

88.5281%

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Step-by-Step Solution: 18/44 + 10/21

Step 1

Find the Least Common Denominator (LCD)

The denominators 44 and 21 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 44 × 21 = 924.

LCD(44, 21) = 924

Step 2

Convert to Equivalent Fractions with Common Denominator 924

Multiply the numerator and denominator of 18/44 by 21, and multiply the numerator and denominator of 10/21 by 44 so both fractions share the common base 924.

18 × 21/44 × 21 = 378/924 and 10 × 44/21 × 44 = 440/924

Step 3

Add the Numerators

Now add the numerators (378 + 440 = 818) and keep the common denominator 924 unchanged.

378 + 440/924 = 818/924

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 818 and 924, which is 2. Divide both the numerator and denominator by 2.

818 ÷ 2/924 ÷ 2 = 409/462

Step 5

Decimal & Percentage Representation

Dividing the numerator 409 by denominator 462 produces a repeating decimal (approximately 0.885281, or 88.5281%).

409 ÷ 462 = 0.885281 (88.5281%)

Visual Representation

The diagram below illustrates 18/44 plus 10/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`409/462`
Mixed Number Form	`409/462`
Decimal Form	`0.885281`
Percentage	`88.5281%`

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Frequently Asked Questions

What is 18/44 plus 10/21 as a fraction?

18/44 + 10/21 in simplest fraction form is 409/462.

What is 18/44 plus 10/21 as a decimal?

18/44 + 10/21 converted to a decimal is 0.885281.

What is 18/44 plus 10/21 as a percentage?

18/44 + 10/21 expressed as a percentage is 88.5281%.

Does 18/44 plus 10/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.885281...) because the denominator contains prime factors other than 2 and 5.