(-3分之一)的平方÷ {27分之-8的立方根-【15分之2×根号9分之25+(-2分之一)的立方÷20分之3】}
=1/9÷{-2/27-[2/15×5/3-1/8×20/3]}
=1/9÷[-2/27-(2/9-5/6)]
=1/9÷29/54
=1/9×54/29
=6/29
(-3分之一)的平方÷ {27分之-8的立方根-【15分之2×根号9分之25+(-2分之一)的立方÷20分之3】}
=1/9÷{-2/27-[2/15×5/3-1/8×20/3]}
=1/9÷[-2/27-(2/9-5/6)]
=1/9÷29/54
=1/9×54/29
=6/29