The simplest form of 7/21 is 1/3.
Steps to simplifying fractions
- Find the GCD (or HCF) of numerator and denominator
GCD of 7 and 21 is 7 - Divide both the numerator and denominator by the GCD
7 ÷ 7/21 ÷ 7 - Reduced fraction: 1/3
Therefore, 7/21 simplified to lowest terms is 1/3.
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Equivalent fractions: 14/42 21/63 35/105 49/147 1/3
More fractions: 14/21 7/42 21/21 7/63 8/21 7/226/21 7/20