What is 1/16 plus 11/21? (Answer: 197/336)

Exact Answer

==================================================
Problem: What is 1/16 plus 11/21?
Formula / Expression: 1/16 + 11/21
Final Answer: 197/336
==================================================

Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 16 and 21 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 16 × 21 = 336.
Working: LCD(16, 21) = 336

Step 2: Convert to Equivalent Fractions with Common Denominator 336
Multiply the numerator and denominator of 1/16 by 21, and multiply the numerator and denominator of 11/21 by 16 so both fractions share the common base 336.
Working: 1 × 21/16 × 21 = 21/336 and 11 × 16/21 × 16 = 176/336

Step 3: Add the Numerators
Now add the numerators (21 + 176 = 197) and keep the common denominator 336 unchanged.
Working: 21 + 176/336 = 197/336

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 197 and 336 is 1, confirming that 197/336 cannot be reduced further—it is already in its simplest irreducible form.
Working: 197/336

Step 5: Decimal & Percentage Representation
Dividing the numerator 197 by denominator 336 produces a repeating decimal (approximately 0.58631, or 58.631%).
Working: 197 ÷ 336 = 0.58631 (58.631%)

Key Values:
- Simplified Fraction: 197/336
- Mixed Number Form: 197/336
- Decimal Value: 0.58631
- Percentage: 58.631%

--------------------------------------------------
Solved with FractionsCalc:
https://fractionscalc.com/what-is-1-16-plus-11-21/
==================================================

1/16 + 11/21 = 197/336

Simplified Fraction

197/336

Mixed Number

Proper (197/336)

Decimal Value

0.58631

Percentage

58.631%

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: 1/16 + 11/21

Step 1

Find the Least Common Denominator (LCD)

The denominators 16 and 21 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 16 × 21 = 336.

LCD(16, 21) = 336

Step 2

Convert to Equivalent Fractions with Common Denominator 336

Multiply the numerator and denominator of 1/16 by 21, and multiply the numerator and denominator of 11/21 by 16 so both fractions share the common base 336.

1 × 21/16 × 21 = 21/336 and 11 × 16/21 × 16 = 176/336

Step 3

Add the Numerators

Now add the numerators (21 + 176 = 197) and keep the common denominator 336 unchanged.

21 + 176/336 = 197/336

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 197 and 336 is 1, confirming that 197/336 cannot be reduced further—it is already in its simplest irreducible form.

197/336

Step 5

Decimal & Percentage Representation

Dividing the numerator 197 by denominator 336 produces a repeating decimal (approximately 0.58631, or 58.631%).

197 ÷ 336 = 0.58631 (58.631%)

Visual Representation

The diagram below illustrates 1/16 plus 11/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`197/336`
Mixed Number Form	`197/336`
Decimal Form	`0.58631`
Percentage	`58.631%`

Was this solution helpful?

Help us improve our free step-by-step tools

Frequently Asked Questions

What is 1/16 plus 11/21 as a fraction?

1/16 + 11/21 in simplest fraction form is 197/336.

What is 1/16 plus 11/21 as a decimal?

1/16 + 11/21 converted to a decimal is 0.58631.

What is 1/16 plus 11/21 as a percentage?

1/16 + 11/21 expressed as a percentage is 58.631%.

Does 1/16 plus 11/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.58631...) because the denominator contains prime factors other than 2 and 5.