I have no idea how 八九不离十 works? My textbooks says  八九不离十 means pretty close and that makes sense to me, but the way they use it makes me lose my head.
“汤姆说考试八九不离十就可以了。” I think they are trying to say &quot; 80/90% is close enough&quot;, but the way they use it doesn't make sense to me at all. What is a better sentence that includes 八九不离十 in it? If it makes sense, could you explain why?
八九不離十 means almost there and I accept it or pretty close and I accept it, the most important thing is and I accept it. The ten may be perfect but if nine or eight are still fine.
“汤姆说考试八九不离十就可以了。” means Tom doesn't chasing for perfect in test.