What is 4/25 plus 4/9? (Answer: 136/225)

Exact Answer

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Problem: What is 4/25 plus 4/9?
Formula / Expression: 4/25 + 4/9
Final Answer: 136/225
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 25 and 9 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 25 × 9 = 225.
Working: LCD(25, 9) = 225

Step 2: Convert to Equivalent Fractions with Common Denominator 225
Multiply the numerator and denominator of 4/25 by 9, and multiply the numerator and denominator of 4/9 by 25 so both fractions share the common base 225.
Working: 4 × 9/25 × 9 = 36/225 and 4 × 25/9 × 25 = 100/225

Step 3: Add the Numerators
Now add the numerators (36 + 100 = 136) and keep the common denominator 225 unchanged.
Working: 36 + 100/225 = 136/225

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 136 and 225 is 1, confirming that 136/225 cannot be reduced further—it is already in its simplest irreducible form.
Working: 136/225

Step 5: Decimal & Percentage Representation
Dividing the numerator 136 by denominator 225 produces a repeating decimal (approximately 0.604444, or 60.4444%).
Working: 136 ÷ 225 = 0.604444 (60.4444%)

Key Values:
- Simplified Fraction: 136/225
- Mixed Number Form: 136/225
- Decimal Value: 0.604444
- Percentage: 60.4444%

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Solved with FractionsCalc:
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4/25 + 4/9 = 136/225

Simplified Fraction

136/225

Mixed Number

Proper (136/225)

Decimal Value

0.604444

Percentage

60.4444%

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Step-by-Step Solution: 4/25 + 4/9

Step 1

Find the Least Common Denominator (LCD)

The denominators 25 and 9 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 25 × 9 = 225.

LCD(25, 9) = 225

Step 2

Convert to Equivalent Fractions with Common Denominator 225

Multiply the numerator and denominator of 4/25 by 9, and multiply the numerator and denominator of 4/9 by 25 so both fractions share the common base 225.

4 × 9/25 × 9 = 36/225 and 4 × 25/9 × 25 = 100/225

Step 3

Add the Numerators

Now add the numerators (36 + 100 = 136) and keep the common denominator 225 unchanged.

36 + 100/225 = 136/225

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 136 and 225 is 1, confirming that 136/225 cannot be reduced further—it is already in its simplest irreducible form.

136/225

Step 5

Decimal & Percentage Representation

Dividing the numerator 136 by denominator 225 produces a repeating decimal (approximately 0.604444, or 60.4444%).

136 ÷ 225 = 0.604444 (60.4444%)

Visual Representation

The diagram below illustrates 4/25 plus 4/9 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`136/225`
Mixed Number Form	`136/225`
Decimal Form	`0.604444`
Percentage	`60.4444%`

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Frequently Asked Questions

What is 4/25 plus 4/9 as a fraction?

4/25 + 4/9 in simplest fraction form is 136/225.

What is 4/25 plus 4/9 as a decimal?

4/25 + 4/9 converted to a decimal is 0.604444.

What is 4/25 plus 4/9 as a percentage?

4/25 + 4/9 expressed as a percentage is 60.4444%.

Does 4/25 plus 4/9 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.604444...) because the denominator contains prime factors other than 2 and 5.