OnlineJudge 3 现已推出。点此体验新版：Above Average | SDUT OnlineJudge

### Above Average

Time Limit: 1000 ms
Memory Limit: 65536 KiB

#### Problem Description

It is said that 90% of frosh expect to be above average in their class. You are to provide a reality check.

#### Input

The first line of standard input contains an integer C, the number of test cases. C data sets follow. Each data set begins with an integer, N, the number of people in the class (1 <= N <= 1000). N integers follow, separated by spaces or newlines, each giving the final grade (an integer between 0 and 100) of a student in the class.

#### Output

For each case you are to output a line giving the percentage of students whose grade is above average, rounded to 3 decimal places.

#### Sample Input

5 5 50 50 70 80 100 7 100 95 90 80 70 60 50 3 70 90 80 3 70 90 81 9 100 99 98 97 96 95 94 93 91

#### Sample Output

40.000% 57.143% 33.333% 66.667% 55.556%

#### Hint

#### Source

面向对数据结构和算法不太了解的同学