What is 18/48 plus 8/21? (Answer: 127/168)

Exact Answer

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Problem: What is 18/48 plus 8/21?
Formula / Expression: 18/48 + 8/21
Final Answer: 127/168
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 48 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 336 (which is smaller than their product 48 × 21 = 1008, keeping the calculation simpler).
Working: LCD(48, 21) = 336

Step 2: Convert to Equivalent Fractions with Common Denominator 336
Multiply the numerator and denominator of 18/48 by 7, and multiply the numerator and denominator of 8/21 by 16 so both fractions share the common base 336.
Working: 18 × 7/48 × 7 = 126/336 and 8 × 16/21 × 16 = 128/336

Step 3: Add the Numerators
Now add the numerators (126 + 128 = 254) and keep the common denominator 336 unchanged.
Working: 126 + 128/336 = 254/336

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 254 and 336, which is 2. Divide both the numerator and denominator by 2.
Working: 254 ÷ 2/336 ÷ 2 = 127/168

Step 5: Decimal & Percentage Representation
Dividing the numerator 127 by denominator 168 produces a repeating decimal (approximately 0.755952, or 75.5952%).
Working: 127 ÷ 168 = 0.755952 (75.5952%)

Key Values:
- Simplified Fraction: 127/168
- Mixed Number Form: 127/168
- Decimal Value: 0.755952
- Percentage: 75.5952%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-18-48-plus-8-21/
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18/48 + 8/21 = 127/168

Simplified Fraction

127/168

Mixed Number

Proper (127/168)

Decimal Value

0.755952

Percentage

75.5952%

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Step-by-Step Solution: 18/48 + 8/21

Step 1

Find the Least Common Denominator (LCD)

The denominators 48 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 336 (which is smaller than their product 48 × 21 = 1008, keeping the calculation simpler).

LCD(48, 21) = 336

Step 2

Convert to Equivalent Fractions with Common Denominator 336

Multiply the numerator and denominator of 18/48 by 7, and multiply the numerator and denominator of 8/21 by 16 so both fractions share the common base 336.

18 × 7/48 × 7 = 126/336 and 8 × 16/21 × 16 = 128/336

Step 3

Add the Numerators

Now add the numerators (126 + 128 = 254) and keep the common denominator 336 unchanged.

126 + 128/336 = 254/336

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 254 and 336, which is 2. Divide both the numerator and denominator by 2.

254 ÷ 2/336 ÷ 2 = 127/168

Step 5

Decimal & Percentage Representation

Dividing the numerator 127 by denominator 168 produces a repeating decimal (approximately 0.755952, or 75.5952%).

127 ÷ 168 = 0.755952 (75.5952%)

Visual Representation

The diagram below illustrates 18/48 plus 8/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`127/168`
Mixed Number Form	`127/168`
Decimal Form	`0.755952`
Percentage	`75.5952%`

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Frequently Asked Questions

What is 18/48 plus 8/21 as a fraction?

18/48 + 8/21 in simplest fraction form is 127/168.

What is 18/48 plus 8/21 as a decimal?

18/48 + 8/21 converted to a decimal is 0.755952.

What is 18/48 plus 8/21 as a percentage?

18/48 + 8/21 expressed as a percentage is 75.5952%.

Does 18/48 plus 8/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.755952...) because the denominator contains prime factors other than 2 and 5.