Final answer:
The correct order is (C) -3/4, -0.25, -9/10
Step-by-step explanation:
The correct order of the numbers -0.25, -9/10, and -3/4 from least to greatest is (C) -3/4, -0.25, -9/10.
To determine the order, we can convert each number to a decimal. -3/4 is -0.75, -0.25 remains the same, and -9/10 is -0.9. So, -3/4 is the smallest, followed by -0.25, and then -9/10 is the largest.