(6)/(15)+(4)/(21) - add fractions

Solution for the given fractions

• 6/15 + 4/21 = ?
• The common denominator of the two fractions is: 105
• 6/15 = (6*7)/(7*15) = 42/105
• 4/21 = (4*5)/(5*21) = 20/105
• Fractions adjusted to a common denominator
• 6/15 + 4/21 = 42/105 + 20/105
• 42/105 + 20/105 = (20+42)/105
• (20+42)/105 = 62/105

Solution for the given fractions

$ \frac{6}{15 }+\frac{ 4}{21 }=? $

The common denominator of the two fractions is: 105

$ \frac{6}{15 }= \frac{(6*7)}{(7*15)} =\frac{ 42}{105} $

$ \frac{4}{21 }= \frac{(4*5)}{(5*21)} =\frac{ 20}{105} $

Fractions adjusted to a common denominator

$ \frac{6}{15 }+\frac{ 4}{21 }=\frac{ 42}{105 }+\frac{ 20}{105} $

$ \frac{42}{105 }+\frac{ 20}{105 }= \frac{(20+42)}{105} $

$ \frac{(20+42)}{105 }=\frac{ 62}{105} $

$ $

see mathematical notation