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3.5 as a fraction

3.5 = 3 1/2 , or 7/2 as an improper fraction.

Checked by test against every decimal in this family · How we check

How it gets there

  1. Put the digits over their place value. 3.5 has 1 decimal place, so it is 35/10.
  2. Divide both by their greatest common divisor, 5: 35 ÷ 5 = 7 and 10 ÷ 5 = 2. That gives 7/2.
  3. 7/2 is more than one, so it also reads as the mixed number 3 1/2.

Questions people actually ask

What is half of 3.5?
7/4, or 1.75 as a decimal. Halving a fraction doubles the denominator rather than halving the top, unless the numerator is even and cancels. Doubled instead, 7/2 is 7 or 7.
What is 3.5 as a fraction?
3 1/2 as a mixed number, or 7/2 as an improper fraction. Both are the same value; a mixed number is easier to picture and an improper fraction is easier to multiply by.
How do you convert 3.5 to a fraction step by step?
Put the digits over their place value — 3.5 has 1 decimal place, so it is 35/10 — then divide both by their greatest common divisor, 5. That gives 7/2 and it cannot reduce further.
Is 7/2 in simplest form?
Yes. The numerator and denominator share no factor above 1, which is what simplest form means. 35/10 is the same number written before that reduction.
What is 7/2 as a decimal?
3.5. This page runs the conversion in the direction people ask for it, and dividing 7 by 2 runs it back the other way.

The same number, other ways

Fraction, lowest terms
7/2
Before reducing
35/10
As a percentage
350%
As a ratio
7:2
Equivalent fractions
14/4, 21/6, 28/8, 35/10
Nearest sixteenth on a tape
3 1/2 (exact)

Work it out for any decimal

The two calculators this page is built from take any numbers you like: reduce a fraction shows the divisor it used, and fraction to decimal goes the other way, to the nearest 16th, 32nd and 64th.

Cite this page

APA
Rule Calculator. (2026). 3.5 as a fraction. Rule Calculator. https://rulecalculators.com/fraction/3-5-as-a-fraction
MLA
"3.5 as a fraction." Rule Calculator, October 1, 2026, https://rulecalculators.com/fraction/3-5-as-a-fraction.
Chicago
Rule Calculator. "3.5 as a fraction." Rule Calculator. Last reviewed October 1, 2026. https://rulecalculators.com/fraction/3-5-as-a-fraction.

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