Decimal number

-21.5

Negative
Decimal
1 d.p.
Exact fraction

-21.5 is a decimal number equal to -43⁄2. It lies between -22 and -21, and as a percentage it is -2,150%.

Number properties

Absolute value21.5

SignNegative

Integer part-21

Fractional part0.5

Decimal places1

Floor-22

Ceiling-21

Rounded to nearest-21

Truncated-21

Fractions & ratios

As a fraction-43/2exact

Ratio-43 : 2

As a percentage-2,150%

Reciprocal-0.0465116279≈

Arithmetic

Double-43

Half-10.75

Square462.25

Cube-9,938.375

Cube root-2.7806488833≈

Negation21.5

Representations

Decimal-21.5

Scientific notation-2.15 × 10^1

Exponential-2.15e+1

IEEE 754 binary64 (hex)0xC035800000000000the exact 64-bit pattern stored

IEEE 754 binary32 (hex)0xC1AC000032-bit single precision, may lose accuracy

Stored as-21.5the nearest binary64 value to what you typed

Rounding

To 0 decimal places-22

To 1 decimal place-21.5

To 2 decimal places-21.50

To 3 decimal places-21.500

To 4 decimal places-21.5000

To 1 significant figure-20

To 2 significant figures-22

To 3 significant figures-21.5

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