Whole Part and Fractional Part
This mixed decimal combines the whole part 1 with the fractional part 555/1000. In place-value words, "and" marks that boundary.
Decimal in the thousandths place
1.555 in Words
1.555 is a positive terminating decimal greater than 1. It has 3 decimal places, and its final digit is in the thousandths place.
Direct Answer
1.555 in words is one point five five five.
1.555 Place-Value Breakdown
The digits 1 form the whole-number part, while 5 in the tenth place, 5 in the hundredth place, and 5 in the thousandth place.
| Part | Digit | Place | Digit value |
|---|---|---|---|
| Whole part | 1 | ones | 1 |
| Decimal part | 5 | tenth | 5/10 |
| Decimal part | 5 | hundredth | 5/100 |
| Decimal part | 5 | thousandth | 5/1000 |
What Kind of Decimal Is 1.555?
1.555 is a positive terminating decimal greater than 1. It is written to the thousandths place.
Expanded Form of 1.555
1.555 = 1 + 5/10 + 5/100 + 5/1000
1.555 = 1 + 555/1000
1.555 = 1 111/200
The final nonzero digit is in the thousandths place, so its value is expressed with a denominator of 1000.
How 1.555 Simplifies to 311/200
1.555 = 1555/1000
The greatest common divisor of 1555 and 1000 is 5.
1555 ÷ 5 = 311
1000 ÷ 5 = 200
Therefore, 1555/1000 = 311/200.
As a mixed fraction, the value is 1 111/200.
1.555 as a Percentage
To convert 1.555 to a percentage, multiply it by 100.
1.555 × 100 = 155.5
Therefore, 1.555 = 155.5%.
Decimals Equivalent to 1.555
1.555 = 1.5550 = 1.55500
Adding zeros to the right of a decimal does not change its numerical value. It does change the number of written decimal places and may communicate different precision.
| Decimal | Final place | Exact fraction | Simplified value |
|---|---|---|---|
| 1.555 | thousandths | 1555/1000 | 311/200 |
| 1.5550 | ten-thousandths | 15550/10000 | 311/200 |
| 1.55500 | hundred-thousandths | 155500/100000 | 311/200 |
1.555 on a Number Line
1.555 lies between 1 and 2. It is 0.445 below 2 and 0.555 above 1.
11.5552
1.555 Compared with Similar Decimals
| Decimal | Spoken form | Place-value form | Fraction | Percentage | Relationship |
|---|---|---|---|---|---|
| 0.1555 | zero point one five five five | one thousand five hundred fifty-five ten-thousandths | 311/2000 | 15.55% | ten times smaller than 1.555 |
| 1.555 | one point five five five | one and five hundred fifty-five thousandths | 311/200 | 155.5% | current value |
| 1.5550 | one point five five five zero | one and five thousand five hundred fifty ten-thousandths | 311/200 | 155.5% | same numerical value, written to the ten-thousandths place |
| 15.55 | fifteen point five five | fifteen and fifty-five hundredths | 311/20 | 1555% | ten times larger than 1.555 |
Quick Practice
How is 1.555 read digit by digit?
One point five five five.
What is the place-value word form of 1.555?
One and five hundred fifty-five thousandths.
What fraction is 1.555 in lowest terms?
311/200.
What percentage is equal to 1.555?
155.5%.
What is 1.555 as a mixed fraction?
1 111/200.
Between which whole numbers does 1.555 lie?
Between 1 and 2.
Frequently Asked Questions
How do you write 1.555 in words?
1.555 in words is one point five five five.
Why is 1.555 called one and five hundred fifty-five thousandths?
Because the digit 5 is in the thousandths place. Therefore, 1.555 represents one and five hundred fifty-five thousandths.
What fraction is 1.555?
1.555 is 1555/1000 exactly and 311/200 in lowest terms.
Can 1555/1000 be simplified?
Yes. Divide its numerator and denominator by 5 to get 311/200.
What percentage is 1.555?
1.555 is equal to 155.5%.
Is 1.555 the same as 1.5550?
Yes. 1.555 and 1.5550 have the same numerical value. However, 1.555 is written to the thousandths place, while 1.5550 is written to the ten-thousandths place and may communicate greater recorded precision.
Is 1.555 larger than 0.1555?
Yes. 1.555 is ten times as large as 0.1555.
What type of decimal is 1.555?
1.555 is a positive terminating decimal greater than 1. It is written to 3 decimal places and represents one and five hundred fifty-five thousandths.