Separate the negatives from the positives. Negative values are always less then positive values.
So we have -0.5 and -0.75 as negatives and 0.75 and 0 as positives.
-0.75 is more negative than -0.5 so the order is -0.75, -0.5.
0 is less then 0.75 so the order is 0, 0.75.
Final order: -0.75, -0.5, 0, 0.75.