Answer:
25%
Explanation:
Walter gave one-fourth of his stamps to his friend.
So, the number of stamps he gave to his friend is:
1/4 * 56 = 14 stamps
To find the percentage of stamps given by Walter to his friend, we need to divide the number of stamps he gave by the total number of stamps he had, and then multiply by 100 to convert it into a percentage.
Percentage of stamps given = (Number of stamps given / Total number of stamps) x 100
Percentage of stamps given = (14 / 56) x 100
Percentage of stamps given = 25%
Therefore, Walter gave 25% of his stamps to his friend.