What is 0.72 as a fraction?

0.72 as a fraction is 18/25. Write the digits over 100 to get 72/100, then divide top and bottom by 4.

What is 0.72 as a percentage?

0.72 is 72%. Multiplying a decimal by 100 moves the point two places to the right.

How many millimetres is 0.72 of an inch?

0.72 inches is 18.288 mm, using the exact definition 1 inch = 25.4 mm.

0.72 as a fraction

Fraction18/25lowest terms

Decimal0.72

Percent72%

How to get there

0.72 has 2 digits after the point, so it is that many hundredths: write the digits over 100 — 72/100.
72 and 100 share a greatest common divisor of 4. Divide both by it: 18/25.

72 of 100 squares — 0.72 of the whole, which is also 72%.

As a measurement

Read as inches, 0.72″ is 18.288 mm exactly. The nearest marks on a rule:

Rule	Nearest mark	Inches	mm	Difference
16ths	3/4″	0.75	19.05	+0.762 mm
32ths	23/32″	0.71875	18.2563	−0.0318 mm
64ths	23/32″	0.71875	18.2563	−0.0318 mm

Common questions

What is 0.72 as a fraction?: 0.72 as a fraction is 18/25. Write the digits over 100 to get 72/100, then divide top and bottom by 4.
What is 0.72 as a percentage?: 0.72 is 72%. Multiplying a decimal by 100 moves the point two places to the right.
How many millimetres is 0.72 of an inch?: 0.72 inches is 18.288 mm, using the exact definition 1 inch = 25.4 mm.

The same number, other ways

18/25Everything about the fraction: equivalents, the bar model, the number line.72%The same value as a percentage, with its own derivation.Decimal → fraction chartThe whole lookup table, printable.Nearest fractionMatch 0.72″ 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.