What is 0.2 as a fraction?

0.2 as a fraction is 1/5. Write the digits over 10 to get 2/10, then divide top and bottom by 2.

What is 0.2 as a percentage?

0.2 is 20%. Multiplying a decimal by 100 moves the point two places to the right.

How many millimetres is 0.2 of an inch?

0.2 inches is 5.08 mm, using the exact definition 1 inch = 25.4 mm.

0.2 as a fraction

Fraction1/5lowest terms

Decimal0.2

Percent20%

How to get there

0.2 has 1 digit after the point, so it is that many tenths: write the digits over 10 — 2/10.
2 and 10 share a greatest common divisor of 2. Divide both by it: 1/5.

20 of 100 squares — 0.2 of the whole, which is also 20%.

As a measurement

Read as inches, 0.2″ is 5.08 mm exactly. The nearest marks on a rule:

Rule	Nearest mark	Inches	mm	Difference
16ths	3/16″	0.1875	4.7625	−0.3175 mm
32ths	3/16″	0.1875	4.7625	−0.3175 mm
64ths	13/64″	0.203125	5.1594	+0.0794 mm

Common questions

What is 0.2 as a fraction?: 0.2 as a fraction is 1/5. Write the digits over 10 to get 2/10, then divide top and bottom by 2.
What is 0.2 as a percentage?: 0.2 is 20%. Multiplying a decimal by 100 moves the point two places to the right.
How many millimetres is 0.2 of an inch?: 0.2 inches is 5.08 mm, using the exact definition 1 inch = 25.4 mm.

The same number, other ways

1/5Everything about the fraction: equivalents, the bar model, the number line.20%The same value as a percentage, with its own derivation.Decimal → fraction chartThe whole lookup table, printable.Nearest fractionMatch 0.2″ 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.