Answer: 100%
Explanation:
Given : The total number of buttons in the bag= 21
The number of larger buttons = 21
Then , the percentage of the buttons were large is given by :-
[tex]\dfrac{\text{Number of large buttons}}{\text{Total buttons}}\times100\\\\\dfrac{21}{21}\times100=100\%[/tex]
Therefore, the percentage of the buttons were large = 100%