Decimal number

-399.5

Negative
Decimal
1 d.p.
Exact fraction

-399.5 is a decimal number equal to -799⁄2. It lies between -400 and -399, and as a percentage it is -39,950%.

Number properties

Absolute value399.5

SignNegative

Integer part-399

Fractional part0.5

Decimal places1

Floor-400

Ceiling-399

Rounded to nearest-399

Truncated-399

Fractions & ratios

As a fraction-799/2exact

Ratio-799 : 2

As a percentage-39,950%

Reciprocal-0.0025031289≈

Arithmetic

Double-799

Half-199.75

Square159,600.25

Cube-63,760,299.875

Cube root-7.364991691≈

Negation399.5

Representations

Decimal-399.5

Scientific notation-3.995 × 10^2

Exponential-3.995e+2

IEEE 754 binary64 (hex)0xC078F80000000000the exact 64-bit pattern stored

IEEE 754 binary32 (hex)0xC3C7C00032-bit single precision, may lose accuracy

Stored as-399.5the nearest binary64 value to what you typed

Rounding

To 0 decimal places-400

To 1 decimal place-399.5

To 2 decimal places-399.50

To 3 decimal places-399.500

To 4 decimal places-399.5000

To 1 significant figure-400

To 2 significant figures-400

To 3 significant figures-400

Keep nerding

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