Answer: 59%
Explanation:
To find the percentage of youths who prefer reading electronic books, we need to divide the number of youths who prefer electronic books by the total number of youths surveyed and then multiply by 100.
The total number of youths surveyed is:
28 + 40 = 68
The number of youths who prefer electronic books is:
40
Dividing the number of youths who prefer electronic books by the total number of youths surveyed and multiplying by 100, we get:
(40/68) x 100% = 58.82%
Rounding to the nearest whole number percent, we get:
59%
Therefore, approximately 59% of the youths surveyed prefer reading electronic books.