Final answer:
AS per the values 8 ribbons have sparkles
Step-by-step explanation:
Amy has a total of 25 ribbons. She bought 4 ribbons and made the rest herself. The number of ribbons she made herself can be calculated by subtracting the number of ribbons she bought from the total number of ribbons:
Total ribbons - Ribbons bought = Ribbons made
25 - 4 = 21 ribbons
Now we can determine how many of these ribbons have sparkles. If 1/3 of the ribbons have sparkles, we can find this by multiplying the total number of ribbons by 1/3:
Total ribbons x (1/3) = Ribbons with sparkles
25 x (1/3) = 8.33 ribbons
Since we can't have a fraction of a ribbon, we round this number down to the nearest whole number.
Therefore, 8 ribbons have sparkles.