What is 0.22 as a fraction?

0.22 as a fraction is 11/50. Write the digits over 100 to get 22/100, then divide top and bottom by 2.

What is 0.22 as a percentage?

0.22 is 22%. Multiplying a decimal by 100 moves the point two places to the right.

How many millimetres is 0.22 of an inch?

0.22 inches is 5.588 mm, using the exact definition 1 inch = 25.4 mm.

0.22 as a fraction

Fraction11/50lowest terms

Decimal0.22

Percent22%

How to get there

0.22 has 2 digits after the point, so it is that many hundredths: write the digits over 100 — 22/100.
22 and 100 share a greatest common divisor of 2. Divide both by it: 11/50.

22 of 100 squares — 0.22 of the whole, which is also 22%.

As a measurement

Read as inches, 0.22″ is 5.588 mm exactly. The nearest marks on a rule:

Rule	Nearest mark	Inches	mm	Difference
16ths	1/4″	0.25	6.35	+0.762 mm
32ths	7/32″	0.21875	5.5563	−0.0318 mm
64ths	7/32″	0.21875	5.5563	−0.0318 mm

Common questions

What is 0.22 as a fraction?: 0.22 as a fraction is 11/50. Write the digits over 100 to get 22/100, then divide top and bottom by 2.
What is 0.22 as a percentage?: 0.22 is 22%. Multiplying a decimal by 100 moves the point two places to the right.
How many millimetres is 0.22 of an inch?: 0.22 inches is 5.588 mm, using the exact definition 1 inch = 25.4 mm.

The same number, other ways

11/50Everything about the fraction: equivalents, the bar model, the number line.22%The same value as a percentage, with its own derivation.Decimal → fraction chartThe whole lookup table, printable.Nearest fractionMatch 0.22″ 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.