Finding Common Percents

75% of a homeroom class dressed up for Halloween. If there are 28 students in the homeroom class, how many students dressed up for Halloween?

• 12 students

• 15 students

• 20 students

• 21 students

What's 1% of 180?

• 0.18

• 1.8

• 18

• 180

Everything in a store is on sale for 50% off. You pick up a sweater that is originally $36. What's the sale price?

• $17

• $18

• $19

• $20

• $16

Change ¹/₂ to a percent.

• 25%

• 10%

• 50%

• 100%

Change ¹/₄ to a percent.

• 10%

• 20%

• 25%

• 50%

Change ³/₄ to a percent.

• 75%

• 20%

• 25%

• 50%

Change ³/₅ to a percent.

• 50%

• 40%

• 60%

• 33.3333...%

Change ⁴/₅ to a percent.

• 20%

• 40%

• 60%

• 80%

Change ¹/₃ to a percent.

• 33.3333...%

• 66.6666...%

• 25%

• 10%

Change ²/₃ to a percent.

• 33.3333...%

• 66.6666...%

• 25%

• 10%