Answer:
18 large buttons
Explanation:
Given that :
A bag of mixed button was purchased ;
Total number of buttons in the bag = 90
Percentage number of large buttons on bag = 20%
Number of large buttons in bag :
(Percentage Number of large buttons * total number of buttons)
= 20% * 90
= 0.2 * 90
= 18
Hence, there are 18 large buttons in the bag.