Number DigitDecimal in the hundredths place
-17.90 in Words
-17.90 is a negative terminating decimal. It has 2 decimal places, and its final digit is in the hundredths place.
Direct Answer
-17.90 in words is negative seventeen point nine zero.
-17.90 has the same numerical value as -17.9, but it is written to the hundredths place.
-17.90 Place-Value Breakdown
The digits 1 and 7 form the whole-number part, while 9 in the tenth place and 0 in the hundredth place.
| Part | Digit | Place | Digit value |
|---|---|---|---|
| Whole part | 1 | tens | 10 |
| Whole part | 7 | ones | 7 |
| Decimal part | 9 | tenth | 9/10 |
| Decimal part | 0 | hundredth | 0/100 |
What Kind of Decimal Is -17.90?
-17.90 is a negative terminating decimal. It is written to the hundredths place.
Written precision: the final 1 zero records precision even though removing it does not change the numerical value.
Expanded Form of -17.90
-17.90 = -(10 + 7 + 9/10)
-17.90 = -(17 + 90/100)
-17.90 = -17 9/10
-17.90 = -1790/100
The nonzero terms determine the numerical value, while the trailing zero preserves the written hundredths precision.
How -17.90 Simplifies to -179/10
-17.90 = -1790/100
The greatest common divisor of 1790 and 100 is 10.
-1790 ÷ 10 = -179
100 ÷ 10 = 10
Therefore, -1790/100 = -179/10.
As a mixed fraction, the value is -17 9/10.
-17.90 as a Percentage
To convert -17.90 to a percentage, multiply it by 100.
-17.90 × 100 = -1790
Therefore, -17.90 = -1790%.
A Familiar Fraction Equivalent
The reduced form -179/10 is a commonly used fraction. The decimal form is convenient for calculation, while the fraction shows the exact part-to-whole relationship.
Trailing Zeros and Written Precision
The final 1 zero does not change the numerical value, but it shows that -17.90 was written to the hundredths place.
Whole Part and Fractional Part
This mixed decimal combines the whole part 17 with the fractional part 90/100. In place-value words, "and" marks that boundary.
How the Negative Sign Changes the Reading
Say "negative" once before the complete word form. The sign changes the direction and value, but it does not change the decimal places or the fraction-reduction steps.
-17.90 on a Number Line
-17.90 lies between -18 and -17. It is 0.1 above -18 and 0.9 below -17.
-17.90 Compared with Similar Decimals
| Decimal | Spoken form | Place-value form | Fraction | Percentage | Relationship |
|---|---|---|---|---|---|
| -1.79 | negative one point seven nine | negative one and seventy-nine hundredths | -179/100 | -179% | one tenth of -17.90 |
| -17.9 | negative seventeen point nine | negative seventeen and nine tenths | -179/10 | -1790% | same numerical value, fewer written decimal places |
| -17.90 | negative seventeen point nine zero | negative seventeen and ninety hundredths | -179/10 | -1790% | current value |
| -17.900 | negative seventeen point nine zero zero | negative seventeen and nine hundred thousandths | -179/10 | -1790% | same numerical value, written to the thousandths place |
| -179.0 | negative one hundred seventy-nine point zero | negative one hundred seventy-nine | -179 | -17900% | ten times -17.90 |
Quick Practice
How is -17.90 read digit by digit?
Negative seventeen point nine zero.
What is the place-value word form of -17.90?
Negative seventeen and ninety hundredths.
What fraction is -17.90 in lowest terms?
-179/10.
What percentage is equal to -17.90?
-1790%.
What is the absolute value of -17.90?
17.90.
Between which whole numbers does -17.90 lie?
Between -18 and -17.
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 -17.90 in words?
-17.90 in words is negative seventeen point nine zero.
Why is -17.90 called negative seventeen and ninety hundredths?
There are 2 digits after the point, so the fractional part is expressed in hundredths. Read the complete value as negative seventeen and ninety hundredths.
What fraction is -17.90?
-17.90 is -1790/100 exactly and -179/10 in lowest terms.
Can -1790/100 be simplified?
Yes. Divide its numerator and denominator by 10 to get -179/10.
What percentage is -17.90?
-17.90 is equal to -1790%.
Is -17.90 the same as -17.900?
Yes. -17.90 and -17.900 have the same numerical value. However, -17.90 is written to the hundredths place, while -17.900 is written to the thousandths place and may communicate greater recorded precision.
Is -17.90 larger than -1.79?
No. Negative values reverse the comparison; -17.90 is ten times the value of -1.79.
What type of decimal is -17.90?
-17.90 is a negative terminating decimal. It is written to 2 decimal places and represents negative seventeen and ninety hundredths.