What is 8/28 plus 2/3? (Answer: 20/21)

Exact Answer

==================================================
Problem: What is 8/28 plus 2/3?
Formula / Expression: 8/28 + 2/3
Final Answer: 20/21
==================================================

Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 28 and 3 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 28 × 3 = 84.
Working: LCD(28, 3) = 84

Step 2: Convert to Equivalent Fractions with Common Denominator 84
Multiply the numerator and denominator of 8/28 by 3, and multiply the numerator and denominator of 2/3 by 28 so both fractions share the common base 84.
Working: 8 × 3/28 × 3 = 24/84 and 2 × 28/3 × 28 = 56/84

Step 3: Add the Numerators
Now add the numerators (24 + 56 = 80) and keep the common denominator 84 unchanged.
Working: 24 + 56/84 = 80/84

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 80 and 84, which is 4. Divide both the numerator and denominator by 4.
Working: 80 ÷ 4/84 ÷ 4 = 20/21

Step 5: Decimal & Percentage Representation
Dividing the numerator 20 by denominator 21 produces a repeating decimal (approximately 0.952381, or 95.2381%).
Working: 20 ÷ 21 = 0.952381 (95.2381%)

Key Values:
- Simplified Fraction: 20/21
- Mixed Number Form: 20/21
- Decimal Value: 0.952381
- Percentage: 95.2381%

--------------------------------------------------
Solved with FractionsCalc:
https://fractionscalc.com/what-is-8-28-plus-2-3/
==================================================

8/28 + 2/3 = 20/21

Simplified Fraction

20/21

Mixed Number

Proper (20/21)

Decimal Value

0.952381

Percentage

95.2381%

Reduce / Convert Fraction:

Convert Fraction:

Enter Decimal Number:

Enter Percentage: %

What is % of

From Value: To Value:

Simplify Ratio: :

Switch to Proportion / Missing X Solver (A/B = C/D) →

Enter 3 known numbers and leave 1 empty (or type x) to solve:

← Switch to Ratio Simplifier (A:B)

Provide any 2 values below to calculate the remaining:

Price before discount

Discount

Price after discount

You saved

+ Add Sales Tax & Extra Coupon (Optional)

Sales Tax: % Extra Off: %

Provide any 2 values below to calculate the remaining:

Cost

Markup

REVENUE

Gross Profit

Profit Margin

Bill Subtotal

Tip Percentage

Split (People)

👥

Quick Tip:

Total Bill

Split Between

👥

Tip % (Optional)

Include Tip:

Total Price

Quantity

Unit of Measure

← Discount & Sales Tax • Ratio Simplifier (A:B) →

First Number: Second Number:

Find All Factors of:

Dividend: ÷ Divisor:

Number to Round: To Nearest:

Method: Standard (5+ ↑) Always Up (Ceil) Always Down (Floor)

Presets:

√ Square Root of: OR Power (x^y): ^{^}

x² + x + = 0

Number (n! & log):

Circle Radius (r):

Side a: Side b:

Angle (Degrees): °

Numbers (comma separated):

Total Items (n): Choose (r):

Decimal Number:

Number (1–3999):

Step-by-Step Solution: 8/28 + 2/3

Step 1

Find the Least Common Denominator (LCD)

The denominators 28 and 3 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 28 × 3 = 84.

LCD(28, 3) = 84

Step 2

Convert to Equivalent Fractions with Common Denominator 84

Multiply the numerator and denominator of 8/28 by 3, and multiply the numerator and denominator of 2/3 by 28 so both fractions share the common base 84.

8 × 3/28 × 3 = 24/84 and 2 × 28/3 × 28 = 56/84

Step 3

Add the Numerators

Now add the numerators (24 + 56 = 80) and keep the common denominator 84 unchanged.

24 + 56/84 = 80/84

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 80 and 84, which is 4. Divide both the numerator and denominator by 4.

80 ÷ 4/84 ÷ 4 = 20/21

Step 5

Decimal & Percentage Representation

Dividing the numerator 20 by denominator 21 produces a repeating decimal (approximately 0.952381, or 95.2381%).

20 ÷ 21 = 0.952381 (95.2381%)

Visual Representation

The diagram below illustrates 8/28 plus 2/3 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`20/21`
Mixed Number Form	`20/21`
Decimal Form	`0.952381`
Percentage	`95.2381%`

Was this solution helpful?

Help us improve our free step-by-step tools

Frequently Asked Questions

What is 8/28 plus 2/3 as a fraction?

8/28 + 2/3 in simplest fraction form is 20/21.

What is 8/28 plus 2/3 as a decimal?

8/28 + 2/3 converted to a decimal is 0.952381.

What is 8/28 plus 2/3 as a percentage?

8/28 + 2/3 expressed as a percentage is 95.2381%.

Does 8/28 plus 2/3 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.952381...) because the denominator contains prime factors other than 2 and 5.