If a number cube is rolled once, what is the probability that it will stop with a composite number on top

50%

Step-by-step explanation:

2, 4, 6 = 3 composite numbers

There are six numbers. Count the number of composite numbers.

Write it as a fraction.

3/6

Then convert it to a percent.

3/6 converts to 50%

rounding to the nearest thousandth would be 452,000