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].

[87, 34, 59, -97, -67, -71, -28, -51, 56]
[60.5, 46.5, -19.0, -82.0, -69.0, -49.5, -39.5, 2.5]