Question

What is the best estimate for this sum?

1/3 + 4/7

Answer 1

Answer: 19/21

Step-by-step explanation: Find the least common denominator of the two which is 21 the first fraction since 3 X 7=21

For the first fraction since 3X7=21, 1/3=1X7=7/3X7=7/21

For the second fraction since 7X3=21, 4/7=4X3/7X3=12/21

Add the two like fractions 7/21+12/21=7+12/21=19/21

The answer is 1/3+4/7=19/21

Answer 2

LCD:21

1•7/3•7= 7/21+12/21

7+12/21

19/21 answer