Answer: 16
Explanation:
We can solve this by using the equation: 4/5 x 20 = y
(y is the answer)
Now we can solve it. You can just solve 4/5 x 20, or if you like using decimals you can change it to 0.8 x 20, becaues 4/5 is equivalent to 0.8.
0.8 x 20 = 16.
Therefore, out of the 20 cookies, 16 are chocolate chip.