A Familiar Fraction Equivalent
The reduced form 31/20 is a commonly used fraction. The decimal form is convenient for calculation, while the fraction shows the exact part-to-whole relationship.
Decimal in the hundredths place
1.55 in Words
1.55 is a positive terminating decimal greater than 1. It has 2 decimal places, and its final digit is in the hundredths place.
Direct Answer
1.55 in words is one point five five.
1.55 Place-Value Breakdown
The digits 1 form the whole-number part, while 5 in the tenth place and 5 in the hundredth place.
| Part | Digit | Place | Digit value |
|---|---|---|---|
| Whole part | 1 | ones | 1 |
| Decimal part | 5 | tenth | 5/10 |
| Decimal part | 5 | hundredth | 5/100 |
What Kind of Decimal Is 1.55?
1.55 is a positive terminating decimal greater than 1. It is written to the hundredths place.
Expanded Form of 1.55
1.55 = 1 + 5/10 + 5/100
1.55 = 1 + 55/100
1.55 = 1 11/20
The final nonzero digit is in the hundredths place, so its value is expressed with a denominator of 100.
How 1.55 Simplifies to 31/20
1.55 = 155/100
The greatest common divisor of 155 and 100 is 5.
155 ÷ 5 = 31
100 ÷ 5 = 20
Therefore, 155/100 = 31/20.
As a mixed fraction, the value is 1 11/20.
1.55 as a Percentage
To convert 1.55 to a percentage, multiply it by 100.
1.55 × 100 = 155
Therefore, 1.55 = 155%.
Decimals Equivalent to 1.55
1.55 = 1.550 = 1.5500
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 |
|---|---|---|---|
| 1.55 | hundredths | 155/100 | 31/20 |
| 1.550 | thousandths | 1550/1000 | 31/20 |
| 1.5500 | ten-thousandths | 15500/10000 | 31/20 |
Whole Part and Fractional Part
This mixed decimal combines the whole part 1 with the fractional part 55/100. In place-value words, "and" marks that boundary.
1.55 on a Number Line
1.55 lies between 1 and 2. It is 0.45 below 2 and 0.55 above 1.
11.552
1.55 Compared with Similar Decimals
| Decimal | Spoken form | Place-value form | Fraction | Percentage | Relationship |
|---|---|---|---|---|---|
| 0.155 | zero point one five five | one hundred fifty-five thousandths | 31/200 | 15.5% | ten times smaller than 1.55 |
| 1.55 | one point five five | one and fifty-five hundredths | 31/20 | 155% | current value |
| 1.550 | one point five five zero | one and five hundred fifty thousandths | 31/20 | 155% | same numerical value, written to the thousandths place |
| 15.5 | fifteen point five | fifteen and five tenths | 31/2 | 1550% | ten times larger than 1.55 |
Quick Practice
How is 1.55 read digit by digit?
One point five five.
What is the place-value word form of 1.55?
One and fifty-five hundredths.
What fraction is 1.55 in lowest terms?
31/20.
What percentage is equal to 1.55?
155%.
What is 1.55 as a mixed fraction?
1 11/20.
Between which whole numbers does 1.55 lie?
Between 1 and 2.
Frequently Asked Questions
How do you write 1.55 in words?
1.55 in words is one point five five.
Why is 1.55 called one and fifty-five hundredths?
Because the digit 5 is in the hundredths place. Therefore, 1.55 represents one and fifty-five hundredths.
What fraction is 1.55?
1.55 is 155/100 exactly and 31/20 in lowest terms.
Can 155/100 be simplified?
Yes. Divide its numerator and denominator by 5 to get 31/20.
What percentage is 1.55?
1.55 is equal to 155%.
Is 1.55 the same as 1.550?
Yes. 1.55 and 1.550 have the same numerical value. However, 1.55 is written to the hundredths place, while 1.550 is written to the thousandths place and may communicate greater recorded precision.
Is 1.55 larger than 0.155?
Yes. 1.55 is ten times as large as 0.155.
What type of decimal is 1.55?
1.55 is a positive terminating decimal greater than 1. It is written to 2 decimal places and represents one and fifty-five hundredths.