Proportionality

At the neighborhood Fourth of July party, Mrs. O'Conner plans to serve banana pudding. She plans to make 2 batches for every 9 people attending. If 72 people will attend the Fourth of July party, how many batches does Mrs. O'Connor need to make?

• 8 batches

• 16 batches

• 36 batches

• 12 batches

Find the missing value.
 $\frac{7}{8}\ =\ \frac{X}{28.8}$  

A gear rotates 8 times every 15 seconds. Based on this information, which of the following could NOT be true

• The gear rotates 48 times in 90 seconds

• The gear rotates 32 times in one minute

• The gear rotates 16 times in 30 seconds

• The gear rotates 24 times in 60 seconds

Estimate:

10% of 60

Estimate:

25% of 40

Estimate:

50% of 70

Fifteen is 30% of what number?

(set up a percent proportion)

A recipe for lemonade punch calls for 6 cups of lemonade fro every 24 cups of punch. Which equation can be used to find x, the percent of lemonade in the recipe?

• $\frac{6}{24}\ =\ \frac{x}{100}$

• $\frac{24}{30}\ =\ \frac{x}{100}$

• $\frac{24}{6}\ =\ \frac{x}{100}$

• $\frac{6}{30}\ =\ \frac{x}{100}$

Of the 650 students at Westmoreland Junior High, 80% will attend the field trip. How many students will attend the field trip?

All items produced in a factory are checked for defects. Of the 300 items checked, 3% were found to be defective. How many items checked worked?

• 9 work

• 291 work

• 323 work

• 12 work