(25)/(42)+(7)/(21) - add fractions

Solution for the given fractions

• 25/42 + 7/21 = ?
• The common denominator of the two fractions is: 42
• 25/42 = (1*25)/(1*42) = 25/42
• 7/21 = (2*7)/(2*21) = 14/42
• Fractions adjusted to a common denominator
• 25/42 + 7/21 = 25/42 + 14/42
• (14+25)/42 = 39/42
• 39/42 = 13/14

Solution for the given fractions

$ \frac{25}{42 }+\frac{ 7}{21 }=? $

The common denominator of the two fractions is: 42

$ \frac{25}{42 }= \frac{(1*25)}{(1*42)} =\frac{ 25}{42} $

$ \frac{7}{21 }= \frac{(2*7)}{(2*21)} =\frac{ 14}{42} $

Fractions adjusted to a common denominator

$ \frac{25}{42 }+\frac{ 7}{21 }=\frac{ 25}{42 }+\frac{ 14}{42} $

$ \frac{(14+25)}{42 }=\frac{ 39}{42} $

$ \frac{39}{42 }=\frac{ 13}{14} $

$ $

see mathematical notation