## Problem D: Above Average

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

### Output for Sample Input

40.000%
57.143%
33.333%
66.667%
55.556%