In this task you are given a list of numbers and you need to find the average of each two consecutive values. The average of two numbers a and b is calculated as: (a + b) /2. The output should be a list of the averages of each two consecutive values. A list is presented with two brackets and comma-separated values, like: [1,2,3].

[-55, 42, 30, -2, 12, -38, 20, 64, -41, 55, 87]
[-6.5, 36.0, 14.0, 5.0, -13.0, -9.0, 42.0, 11.5, 7.0, 71.0]