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Ratios, proportions, and percents
Percent of a number: word problems

A baseball pitcher won 80% of the games he pitched. If he pitched 35 ballgames, how many games did he win?

The whole is 35.

The percent is 80%.

Let n represent the part.

Write a proportion and find the cross products to solve for n.

 $\frac{n}{35}$ = $\frac{80}{100}$ 100n = 35 ×80 100n = 2,800 100n ÷ 100 = 2,800 ÷ 100 n = 28

 80% of 35 is 28.

28 games.

Last night, the two dinner specials at Johnelle's favorite restaurant were salmon filet and steak. The restaurant served 20 specials in all, 30% of which were salmon filets. How many salmon filets did the restaurant serve?