
David W. answered 07/24/16
Tutor
4.7
(90)
retired
2 1/6 is only a little more than 2.
10 5/6 is only a little less than 11.
[note: It is good that the numerator and the denominator is "more than" and "less than" or vice versa when estimating.]
2/11
Learn to estimate quickly without a calculator [it also helps as a quick validation of an exact answer].
[more notes: 2/11 = 0.1818 and 13/65 = 0.2]