# percentages

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Say an advertiser makes \$0.10 every time someone clicks on their ad. Only 20% of people who visit the site click on their ad. How many people need to visit the site for the advertiser to make \$20?

• percentages -

200

• percentages -

Check this.

• percentages -

0.1x = 20
x = 200 must click on the ad.

0.2y = 200
y = 1,000 must visit the site.

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