Write the fraction 3/5 and 1/3 with common denominator and add the fractions

3/5+1/3

common denominator is 15 (just think about the 3 times table and 5 times table)

5*3=15

3*5=15

Multiply the denominator and numerator by 3 for 3/5

Multiply the denominator and numerator by 5 for 1/3

(3) (3) / (5) (3) + (1) (5) / 3 (5)

9/15+5/15 = 14/15

Answer : 14/15