Decimal number

-2.5

Negative
Decimal
1 d.p.
Exact fraction

-2.5 is a decimal number equal to -5⁄2. It lies between -3 and -2, and as a percentage it is -250%.

Number properties

Absolute value2.5

SignNegative

Integer part-2

Fractional part0.5

Decimal places1

Floor-3

Ceiling-2

Rounded to nearest-2

Truncated-2

Fractions & ratios

As a fraction-5/2exact

Ratio-5 : 2

As a percentage-250%

Reciprocal-0.4≈

Arithmetic

Double-5

Half-1.25

Square6.25

Cube-15.625

Cube root-1.3572088083≈

Negation2.5

Representations

Decimal-2.5

Scientific notation-2.5 × 10^0

Exponential-2.5e+0

IEEE 754 binary64 (hex)0xC004000000000000the exact 64-bit pattern stored

IEEE 754 binary32 (hex)0xC020000032-bit single precision, may lose accuracy

Stored as-2.5the nearest binary64 value to what you typed

Rounding

To 0 decimal places-3

To 1 decimal place-2.5

To 2 decimal places-2.50

To 3 decimal places-2.500

To 4 decimal places-2.5000

To 1 significant figure-3

To 2 significant figures-2.5

To 3 significant figures-2.5

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