What is 80/80 as a Decimal?
80/80 = 1
Step by step
- Simplify: 80/80 = 1/1 (divide by 80)
- Divide the numerator by the denominator: 80 ÷ 80 = 1
How the answer is worked out
A fraction is a division: 80/80 means 80 divided by 80, and doing that division gives 1. The division ends after a few digits, because the simplified denominator has no prime factors other than 2 and 5.
As a percentage, 80/80 is 100%. The top and bottom are equal, so it is exactly 1.
Why calculate this?
Decimals are easier to compare and to use in calculators and spreadsheets than fractions.
- Cooking: a recipe that asks for 80/80 of a cup needs 1 cups, about 240 millilitres.
- Measuring: 80/80 of an inch is 1 inches, or 25.4 millimetres.
- Money: 80/80 of a dollar is about $1, and 80/80 of $100 is $100.
A quicker way
The simplified denominator 1 divides 10, so scale the fraction up instead of dividing: 1/1 = 10/10 = 1.
Check the answer
Work backwards: 1 × 80 = 80, which is 80 once rounding is allowed for.
Rounding
Rounded to a whole number the decimal is 1, to one decimal place 1.0 and to two decimal places 1.00. Round only at the end: rounding halfway through a calculation can change the last digit.
The formula explained
decimal = numerator ÷ denominator. The numerator is the top number and counts the pieces; the denominator is the bottom number and says how many equal pieces make a whole. Dividing the top by the bottom gives the size of the fraction as a decimal.
Another worked example: 16/32 as a decimal
- Simplify: 16/32 = 1/2 (divide by 16)
- Divide the numerator by the denominator: 16 ÷ 32 = 0.5
Equivalent fractions
80/80 has the same value as 160/160, 240/240 and 800/800: multiplying the top and bottom by the same number never changes a fraction. All of them give 1 when divided out.
Comparing with nearby fractions
80/80 (1) is bigger than 80/81 (0.9877) and smaller than 81/80 (1.0125). A bigger denominator means smaller pieces, so with the same numerator the fraction gets smaller.
The reciprocal
Flipping the fraction gives 80/80 = 1. A number multiplied by its reciprocal is always 1: 80/80 × 80/80 = 1.
In time and money
80/80 of an hour is 60 minutes, and 80/80 of a day is 24 hours.
In a pie chart
A slice worth 80/80 of the whole takes up 360 degrees of the circle, because a full turn is 360 degrees. That is the angle to draw when you make the chart by hand with a protractor.
Other ways to ask this
The same calculation is often asked in other words. All of these have the answer above:
- 80/80 in decimal form
- 80 divided by 80
- Convert 80 over 80 to a decimal
- What is 80 ÷ 80?
- 80 out of 80 as a decimal number
Terms used on this page
- Numerator: the top number of a fraction.
- Denominator: the bottom number, the number of equal parts in a whole.
- Terminating decimal: a decimal that ends, such as 0.25.
- Repeating decimal: a decimal whose digits repeat forever, such as 0.333….
The answer in other forms
| Decimal | 1 |
|---|---|
| Percentage | 100% |
| Simplified | 1/1 |
| Type | equals 1 |
Related results
| 1/80 as a decimal | 1/80 = 0.0125 |
| 2/80 as a decimal | 2/80 = 0.025 |
| 3/80 as a decimal | 3/80 = 0.0375 |
| 81/80 as a decimal | 81/80 = 1.0125 |
| 79/80 as a decimal | 79/80 = 0.9875 |
The other way round: 80/80 as a decimal
Doing it in a spreadsheet
In Excel, Google Sheets or Numbers type =80/80 into any cell. Replace the numbers with cell references (for example A1 and B1) to reuse the formula for a whole column.
Common mistakes
Dividing the denominator by the numerator flips the fraction. A bar over (or brackets around) digits means they repeat forever.
Practice examples
| 16/32 as a decimal | Show answer16/32 = 0.5 |
| 4/8 as a decimal | Show answer4/8 = 0.5 |
| 35/68 as a decimal | Show answer35/68 = 0.51(4705882352941176) |
| 44/96 as a decimal | Show answer44/96 = 0.458(3) |
| 3/96 as a decimal | Show answer3/96 = 0.03125 |
| 84/97 as a decimal | Show answer84/97 = 0.865979381443298969072164948453608247422680412371134020618556 |
| 32/97 as a decimal | Show answer32/97 = 0.329896907216494845360824742268041237113402061855670103092783 |
| 58/35 as a decimal | Show answer58/35 = 1.6(571428) |
| 60/28 as a decimal | Show answer60/28 = 2.(142857) |
| 63/90 as a decimal | Show answer63/90 = 0.7 |
How this answer was calculated
The result is worked out from the numbers in this page's address when the page is opened, using exact arithmetic wherever possible and rounding only for display. Nothing is copied from a printed table. If you think an answer is wrong, please tell us through the contact page and we will check it.
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Questions
What is 80/80 as a Decimal?
80/80 as a decimal is 1. Long-division steps and simplified fraction.
What is 80/80 as a percentage?
100%. Multiply the decimal 1 by 100.
What is 80/80 in simplest form?
1/1. Divide the top and bottom by their greatest common factor, 80.
Is 80/80 a terminating or a repeating decimal?
Terminating: it stops at 1.
What is 80/80 rounded to two decimal places?
1.00. Rounded to three places it is 1.000.
What is 80/80 of 100?
100. Multiply 100 by 80 and divide by 80, or multiply 100 by the decimal 1.
What is 80/80 as a ratio?
80:80, or 1:1 in simplest form. A ratio compares the part with the whole in the same way the fraction does.