Answer:
25 games
Step-by-step explanation:
In my opinion, it is easiest to solve this problem with a proportion.
Since 20 is 1/4 of 80, the answer would be 1/4 of 100, which is 25.
For more complex problems like this, proportions would be even more useful:
20/80 = x/100
20 * 100 / 80 = 25
