Final answer:
To calculate the percentage of out-of-service computers, divide 3 (the number out of service) by 30 (the total number), then multiply by 100, resulting in 10% of the computers being out of service.
Step-by-step explanation:
To find the percentage of computers that are out of service, we can use a simple calculation. We know that there are a total of 30 computers, and 3 of them are out of service. To find the percentage, we divide the number of out-of-service computers by the total number of computers and then multiply by 100.
Percentage out of service = (Number of out-of-service computers / Total number of computers) × 100
Percentage out of service = (3 / 30) × 100
= 0.1 × 100
= 10%
Therefore, the percentage of computers that are out of service is 10%.