What is 10/21 plus 11/21?
10/21 plus 11/21 equals 1 (or 1 in decimal form). Learn the step-by-step solution to add 10/21 and 11/21 using Least Common Denominator and simplification.
Exact Answer
10/21 + 11/21 = 1
Simplified Fraction
1
Mixed Number
1
Decimal Value
1
Percentage
100%
Step-by-Step Solution: 10/21 + 11/21
Step 1
Check the Denominators (Like Fractions)
Both fractions already share the identical denominator (21). Because these are like fractions, no conversion to a common denominator is required—we directly add their numerators while keeping the denominator 21.
10/21 + 11/21
Step 2
Add the Numerators
Now add the numerators (10 + 11 = 21) and keep the common denominator 21 unchanged.
10 + 11/21 = 21/21
Step 3
Simplify to an Exact Whole Number
Notice that the numerator (21) is completely divisible by the denominator (21). Dividing 21 by 21 yields the whole number 1 with zero remainder.
21/21 = 1
Step 4
Decimal & Percentage Representation
Dividing the numerator 1 by denominator 1 yields an exact terminating decimal of 1 (or 100%).
1 ÷ 1 = 1 (100%)
Visual Representation
The diagram below illustrates 10/21 plus 11/21 visually:
+
=
Summary & Alternative Representations
| Property / Format | Value |
|---|---|
| Lowest Terms Fraction | 1 |
| Mixed Number Form | 1 |
| Decimal Form | 1 |
| Percentage | 100% |
Was this solution helpful?
Help us improve our free step-by-step tools
Frequently Asked Questions
What is 10/21 plus 11/21 as a fraction?
10/21 + 11/21 in simplest fraction form is 1.
What is 10/21 plus 11/21 as a decimal?
10/21 + 11/21 converted to a decimal is 1.
What is 10/21 plus 11/21 as a percentage?
10/21 + 11/21 expressed as a percentage is 100%.
Is the answer to 10/21 plus 11/21 a whole number?
Yes, 10/21 + 11/21 simplifies completely to the whole number 1 with no remaining fractional part.