Fractions, Decimals, and Percentages Conversion
By Dr. Iris Vaughan, Mathematics Editor·Published 15 August 2025·Last reviewed 15 February 2026
The thirty most common fraction-decimal-percent equivalents, conversion procedures, and the operations rules for each form.
Key Formulas
½=0.5=50%
⅓≈0.333=33.3%
¼=0.25=25%
⅕=0.2=20%
⅛=0.125=12.5%
1/10=0.1=10%
To convert fraction to %: multiply by 100. To convert % to decimal: divide by 100.
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