Decimal number

0.2

Positive
Decimal
1 d.p.
Exact fraction

0.2 is a decimal number equal to 1⁄5. It lies between 0 and 1, and as a percentage it is 20%.

Number properties

Absolute value0.2

SignPositive

Integer part0

Fractional part0.2

Decimal places1

Floor0

Ceiling1

Rounded to nearest0

Truncated0

Fractions & ratios

As a fraction1/5exact

Ratio1 : 5

As a percentage20%

Reciprocal5≈

Arithmetic

Double0.4

Half0.1

Square0.04

Cube0.008

Square root0.4472135955≈

Cube root0.5848035476≈

Negation-0.2

Natural logarithm-1.6094379124≈

Logarithm base 10-0.6989700043≈

Representations

Decimal0.2

Scientific notation2 × 10^-1

Exponential2e-1

IEEE 754 binary64 (hex)0x3FC999999999999Athe exact 64-bit pattern stored

IEEE 754 binary32 (hex)0x3E4CCCCD32-bit single precision, may lose accuracy

Stored as0.2the nearest binary64 value to what you typed

Rounding

To 0 decimal places0

To 1 decimal place0.2

To 2 decimal places0.20

To 3 decimal places0.200

To 4 decimal places0.2000

To 1 significant figure0.2

To 2 significant figures0.2

To 3 significant figures0.2

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