Final answer:
Brendan's record collection has increased by 20%. This was calculated by finding the increase of records from 25 to 30, which is 5, then dividing by the original count 25, and finally multiplying by 100 to get the percentage.
Step-by-step explanation:
The student is asking about how to calculate the percent increase in the number of records in Brendan's collection. To calculate the percent increase, you need to determine the increase in the number of records and then divide that by the original number.
Brendan had an initial count of 25 records and now has 30 records. The increase in the number of records is 30 - 25, which equals 5. To find the percent increase, you take the increase divided by the original number and then multiply by 100 to convert it to a percentage.
Percent Increase equals to (Increase divided by Original Number) x 100
Percent Increase = (5 / 25) x 100
Percent Increase = 0.20 x 100
Percent Increase = 20%
Therefore, the percent increase in Brendan's record collection is 20%.