What is 2/54 plus 2/21? (Answer: 25/189)

Exact Answer

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Problem: What is 2/54 plus 2/21?
Formula / Expression: 2/54 + 2/21
Final Answer: 25/189
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 54 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 378 (which is smaller than their product 54 × 21 = 1134, keeping the calculation simpler).
Working: LCD(54, 21) = 378

Step 2: Convert to Equivalent Fractions with Common Denominator 378
Multiply the numerator and denominator of 2/54 by 7, and multiply the numerator and denominator of 2/21 by 18 so both fractions share the common base 378.
Working: 2 × 7/54 × 7 = 14/378 and 2 × 18/21 × 18 = 36/378

Step 3: Add the Numerators
Now add the numerators (14 + 36 = 50) and keep the common denominator 378 unchanged.
Working: 14 + 36/378 = 50/378

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 50 and 378, which is 2. Divide both the numerator and denominator by 2.
Working: 50 ÷ 2/378 ÷ 2 = 25/189

Step 5: Decimal & Percentage Representation
Dividing the numerator 25 by denominator 189 produces a repeating decimal (approximately 0.132275, or 13.2275%).
Working: 25 ÷ 189 = 0.132275 (13.2275%)

Key Values:
- Simplified Fraction: 25/189
- Mixed Number Form: 25/189
- Decimal Value: 0.132275
- Percentage: 13.2275%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-2-54-plus-2-21/
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2/54 + 2/21 = 25/189

Simplified Fraction

25/189

Mixed Number

Proper (25/189)

Decimal Value

0.132275

Percentage

13.2275%

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Step-by-Step Solution: 2/54 + 2/21

Step 1

Find the Least Common Denominator (LCD)

The denominators 54 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 378 (which is smaller than their product 54 × 21 = 1134, keeping the calculation simpler).

LCD(54, 21) = 378

Step 2

Convert to Equivalent Fractions with Common Denominator 378

Multiply the numerator and denominator of 2/54 by 7, and multiply the numerator and denominator of 2/21 by 18 so both fractions share the common base 378.

2 × 7/54 × 7 = 14/378 and 2 × 18/21 × 18 = 36/378

Step 3

Add the Numerators

Now add the numerators (14 + 36 = 50) and keep the common denominator 378 unchanged.

14 + 36/378 = 50/378

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 50 and 378, which is 2. Divide both the numerator and denominator by 2.

50 ÷ 2/378 ÷ 2 = 25/189

Step 5

Decimal & Percentage Representation

Dividing the numerator 25 by denominator 189 produces a repeating decimal (approximately 0.132275, or 13.2275%).

25 ÷ 189 = 0.132275 (13.2275%)

Visual Representation

The diagram below illustrates 2/54 plus 2/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`25/189`
Mixed Number Form	`25/189`
Decimal Form	`0.132275`
Percentage	`13.2275%`

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Frequently Asked Questions

What is 2/54 plus 2/21 as a fraction?

2/54 + 2/21 in simplest fraction form is 25/189.

What is 2/54 plus 2/21 as a decimal?

2/54 + 2/21 converted to a decimal is 0.132275.

What is 2/54 plus 2/21 as a percentage?

2/54 + 2/21 expressed as a percentage is 13.2275%.

Does 2/54 plus 2/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.132275...) because the denominator contains prime factors other than 2 and 5.