Total number of peaches = 15
Percentage of blank peaches out of the total peaches = 75%
Then
Number of blank peaches out of the total peaches = (75/100) * 15
= (3/4) * 15
= 45/4
= 11 1/4
So 11 1/4 peaches are blank. If you do not want to include the fraction part of the answer, then you can take either 11 or 12 peaches to be blank as well. I hope the procedure is clear enough for you to understand. You can definitely use this simple but effective method for solving similar kind of problems in future.