What is 0.83 as a fraction?

0.83 as a fraction is 83/100. The digits go over 100, and 83 and 100 share no common factor, so it is already in lowest terms.

What is 0.83 as a percentage?

0.83 is 83%. Multiplying a decimal by 100 moves the point two places to the right.

How many millimetres is 0.83 of an inch?

0.83 inches is 21.082 mm, using the exact definition 1 inch = 25.4 mm.

0.83 as a fraction

Fraction83/100lowest terms

Decimal0.83

Percent83%

How to get there

0.83 has 2 digits after the point, so it is that many hundredths: write the digits over 100 — 83/100.
83 and 100 share no factor but 1, so 83/100 is already in lowest terms.

83 of 100 squares — 0.83 of the whole, which is also 83%.

As a measurement

Read as inches, 0.83″ is 21.082 mm exactly. The nearest marks on a rule:

Rule	Nearest mark	Inches	mm	Difference
16ths	13/16″	0.8125	20.6375	−0.4445 mm
32ths	27/32″	0.84375	21.4313	+0.3493 mm
64ths	53/64″	0.828125	21.0344	−0.0476 mm

Common questions

What is 0.83 as a fraction?: 0.83 as a fraction is 83/100. The digits go over 100, and 83 and 100 share no common factor, so it is already in lowest terms.
What is 0.83 as a percentage?: 0.83 is 83%. Multiplying a decimal by 100 moves the point two places to the right.
How many millimetres is 0.83 of an inch?: 0.83 inches is 21.082 mm, using the exact definition 1 inch = 25.4 mm.

The same number, other ways

83/100Everything about the fraction: equivalents, the bar model, the number line.83%The same value as a percentage, with its own derivation.Decimal → fraction chartThe whole lookup table, printable.Nearest fractionMatch 0.83″ against any rule, with the exact error.

Where this comes from. Exact rational arithmetic on the values shown — fractions are pairs of integers until display, and inch–metric conversion uses 25.4 mm to the inch, exact by definition since 1959. See the full methodology.