Given the task definition and input, reply with output. 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].

[-27, -57, 74, -49, 80, 26, -42, 67, 84, -92]

[-42.0, 8.5, 12.5, 15.5, 53.0, -8.0, 12.5, 75.5, -4.0]