Answer:
Percentage of computers working equals:
90%
Step-by-step explanation:
Three of the thirty computers are out of service.
Number of computers working=30-3=27
Total computers=30
Percentage of working computers= [tex]\dfrac{Number\ of\ computers\ working}{Total\ computers}\times 100[/tex]
= [tex]\dfrac{27}{30}\times 100[/tex]
= 90%
Hence, Percentage of computers working is:
90%
