2 2/7 is close to 2.
8 11/13 is close to 9.
2 * 9 = 18, so my estimate is that 2 2/7 * 8 11/13 is approximately 18
2/7 is less than 1/2 ⇒ discard
2 2/7 ≈ 2
11/13 is more than 1/2 ⇒ add 1 to the whole number
8 11/13 ≈ 9
2 2/7 x 8 11/13 ≈ 2 x 9 = 18
Answer: (B) 18
