Final answer:
In the computer class with 20 computers and 25 students, 80% of the students can use a computer without sharing by dividing the number of computers by the total number of students and then multiplying by 100.
Step-by-step explanation:
In a computer class with 20 computers and 25 students, some students will need to share. To find the percentage of students that will be able to use a computer without sharing, we start by subtracting the number of computers from the number of students: 25 - 20 = 5. This means 5 students will have to share computers.
Since 20 students will not have to share, we can then calculate the percentage of students who will use a computer without sharing. We divide the number of students who don't have to share by the total number of students and then multiply by 100 to get the percent:
Percentage = (Number of students not sharing / Total number of students) * 100
Percentage = (20 / 25) * 100
Percentage = 80%
Therefore, 80% of the students will be able to use a computer without sharing.