answersLogoWhite

0


Best Answer

3/7+ 9/21 is equal to (3x3)/(7x3) + 9/21 which is equal to 9/21 + 9/21 , because both denominators are the same you can simply add the two numerators which then becomes 18/21 , then yo can cancel it down to 6/7

User Avatar

Wiki User

12y ago
This answer is:
User Avatar
More answers
User Avatar

Wiki User

11y ago

2/7

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is the sum of 1 over 7 pluse 3 over 21?
Write your answer...
Submit
Still have questions?
magnify glass
imp