
Paul L. answered 03/04/16
Tutor
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Experienced, Patient Tutor
The formula to remember for percent questions is:
Part = Percent x Whole
Here x would be Part, since you know the Whole and the Percent
x = .90 x 80
x = 72
Here's another way to think about this question. 90% is almost all; it's just 10% less than all games. You probably can figure 10% of 80 in your head- 8. So, 80 games minus 8 is 72 games.