Number DigitDecimal in the millionths place
42.121971 in Words
42.121971 is a positive terminating decimal greater than 1. It has 6 decimal places, and its final digit is in the millionths place.
Direct Answer
42.121971 in words is forty-two point one two one nine seven one.
42.121971 Place-Value Breakdown
The digits 4 and 2 form the whole-number part, while 1 in the tenth place, 2 in the hundredth place, 1 in the thousandth place, 9 in the ten-thousandth place, 7 in the hundred-thousandth place, and 1 in the millionth place.
| Part | Digit | Place | Digit value |
|---|---|---|---|
| Whole part | 4 | tens | 40 |
| Whole part | 2 | ones | 2 |
| Decimal part | 1 | tenth | 1/10 |
| Decimal part | 2 | hundredth | 2/100 |
| Decimal part | 1 | thousandth | 1/1000 |
| Decimal part | 9 | ten-thousandth | 9/10000 |
| Decimal part | 7 | hundred-thousandth | 7/100000 |
| Decimal part | 1 | millionth | 1/1000000 |
What Kind of Decimal Is 42.121971?
42.121971 is a positive terminating decimal greater than 1. It is written to the millionths place.
Expanded Form of 42.121971
42.121971 = 40 + 2 + 1/10 + 2/100 + 1/1000 + 9/10000 + 7/100000 + 1/1000000
42.121971 = 42 + 121971/1000000
42.121971 = 42 121971/1000000
The final nonzero digit is in the millionths place, so its value is expressed with a denominator of 1000000.
Why 42121971/1000000 Is Already in Lowest Terms
There are 6 decimal places, so the exact fraction is 42121971/1000000.
The greatest common divisor of its numerator and denominator is 1, so the fraction cannot be reduced further.
As a mixed fraction, the value is 42 121971/1000000.
42.121971 as a Percentage
To convert 42.121971 to a percentage, multiply it by 100.
42.121971 × 100 = 4212.1971
Therefore, 42.121971 = 4212.1971%.
Whole Part and Fractional Part
This mixed decimal combines the whole part 42 with the fractional part 121971/1000000. In place-value words, "and" marks that boundary.
42.121971 Compared with Similar Decimals
| Decimal | Spoken form | Place-value form | Fraction | Percentage | Relationship |
|---|---|---|---|---|---|
| 4.2121971 | four point two one two one nine seven one | four and two million one hundred twenty-one thousand nine hundred seventy-one ten-millionths | 42121971/10000000 | 421.21971% | ten times smaller than 42.121971 |
| 42.121971 | forty-two point one two one nine seven one | forty-two and one hundred twenty-one thousand nine hundred seventy-one millionths | 42121971/1000000 | 4212.1971% | current value |
| 42.1219710 | forty-two point one two one nine seven one zero | forty-two and one million two hundred nineteen thousand seven hundred ten ten-millionths | 42121971/1000000 | 4212.1971% | same numerical value, written to the ten-millionths place |
| 421.21971 | four hundred twenty-one point two one nine seven one | four hundred twenty-one and twenty-one thousand nine hundred seventy-one hundred-thousandths | 42121971/100000 | 42121.971% | ten times larger than 42.121971 |
Quick Practice
How is 42.121971 read digit by digit?
Forty-two point one two one nine seven one.
What is the place-value word form of 42.121971?
Forty-two and one hundred twenty-one thousand nine hundred seventy-one millionths.
What fraction is 42.121971 in lowest terms?
42121971/1000000.
What percentage is equal to 42.121971?
4212.1971%.
What is 42.121971 as a mixed fraction?
42 121971/1000000.
Between which whole numbers does 42.121971 lie?
Between 42 and 43.
Convert Another Decimal
Use the full converter for custom input, examples, and the complete place-name chart.
Ready for a lesson or a little practice
Printable decimal worksheets
Each free PDF contains eight questions. Download a separate answer key with explanations. No account is required.
Frequently Asked Questions
How do you write 42.121971 in words?
42.121971 in words is forty-two point one two one nine seven one.
Why is 42.121971 called forty-two and one hundred twenty-one thousand nine hundred seventy-one millionths?
There are 6 digits after the point, so the fractional part is expressed in millionths. Read the complete value as forty-two and one hundred twenty-one thousand nine hundred seventy-one millionths.
What fraction is 42.121971?
42.121971 is 42121971/1000000 exactly and 42121971/1000000 in lowest terms.
Is 42121971/1000000 already in lowest terms?
Yes. Its numerator and denominator have a greatest common divisor of 1.
What percentage is 42.121971?
42.121971 is equal to 4212.1971%.
Is 42.121971 the same as 42.1219710?
Yes. 42.121971 and 42.1219710 have the same numerical value. However, 42.121971 is written to the millionths place, while 42.1219710 is written to the ten-millionths place and may communicate greater recorded precision.
Is 42.121971 larger than 4.2121971?
Yes. 42.121971 is ten times as large as 4.2121971.
What type of decimal is 42.121971?
42.121971 is a positive terminating decimal greater than 1. It is written to 6 decimal places and represents forty-two and one hundred twenty-one thousand nine hundred seventy-one millionths.