SOLUTION
From the question, I understand you are asked which of the numbers are closest to 1
This becomes
![\begin{gathered} (2)/(7)=0.3 \\ 0.1 \\ 0.9 \\ (6)/(8)=0.8 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/6xynwtm7sawhlev4teno9miu9di69i12kz.png)
The largest decimal is 0.9, and it is the closest to 1. This is because 0.9 when rounded up gives 1 and it is the largest of all the decimals as we can see above.
Hence the answer is 0.9 is closest to the benchmark 1.