Negative numbers are less than positive, so they are listed first.
The most negative of the four is -1.5; the least negative is -0.8. So we have:
-1.5, -1.22, -1.01, -0.8.
The largest positive is 1.3, the smallest 0.2983, so we have:
0.2983, 0.68, 1.25, 1.3.
Join them together:
-1.5, -1.22, -1.01, -0.8, 0.2983, 0.68, 1.25, 1.3.