Question

Add : 21/30 + 13/20​

Answer 1

Answer:

31/60

Step-by-step explanation:

21/30+13/20

multiplying 21/30 by 2 and 13/20 by 3 for making denominator same

(21x2/30x2)+(13x3/20x3)

(42/60)+(39/60)

(42+39)/60

83/60

41/30

Answer 2

Answer:

the lcm of 20 and 30 is 60

Step-by-step explanation:

convert it

21/30*2/2=42/60

13/20*3/3=39/60

=81/60

in the simplest form

27/20