1. Introduction to Microeconomics

The price of Clutch Pizza was originally \$12. Clutch decides that everyone deserves more pizza and lowers the price to \$10. Calculate the percentage change in the price of Clutch Pizza.

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Saphia’s lunch bill was \$17.65. She wants to leave an 18% tip. How much should the tip be?

A city's population grew from 120,000 to 138,000 people in one year. What is the percent increase in population?

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18 is what percent of 24?

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Carson bought some new sneaker on sale for \$250. The sale price was 65% of the original price. What was the original price?

A reservoir's water level decreased by 20% over the summer due to evaporation. If the water level is currently at 120 million liters, how much water was there initially?

A square garden has sides of 8ft. The gardener reduces each side by 1ft to make space for a pathway. What is the percent decrease in the perimeter of the garden?

A smartphone originally costs \$800 but is now sold for \$680. Determine the percent decrease in price.

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40% of what number is 68?

Last season, a farmer harvested 500kg of rice. Due to improved techniques, the harvest is estimated to increase by 20% this season. How much rice is the farmer looking to harvest this season?