Sayed gave an answer of 6 6/7 for the problem 4 2/7 times 1 3/5. Using the estimates, is this a reasonable answer.
6 6/7 is near 7
4 2/7 is near 4
1 3/5 is near 1 3/4 = 7/4
4 * 7/4 = 7
Sounds good to me as an estimate
4 2/7 is near 4
1 3/5 is near 1 3/4 = 7/4
4 * 7/4 = 7
Sounds good to me as an estimate