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?
Table of contents
- 1. Whole Numbers1h 55m
- 2. Integers1h 7m
- 3. Introduction to Solving Equations and Problem Solving Coming soon
- 4. Fractions1h 29m
- 5. Decimals1h 20m
- 6. Ratio, Proportion, and Percent2h 3m
- 7. Graphing and Introduction to Statistics Coming soon
- 8. Geometry49m
- 9. Measurement Coming soon
- 10. Linear Equations and Inequalities6h 13m
- The Distributive Property17m
- Review: Addition and Subtraction Properties of Equality41m
- Review: Multiplication and Division Properties of Equality30m
- Solving Linear Equations1h 14m
- Introduction to Problem Solving37m
- Formulas21m
- Review: Percent Problem Solving59m
- Mixture Problem Solving43m
- Linear Inequalities in One Variable46m
- 11. Graphing Linear Equations3h 17m
- 12. Systems of Linear Equations1h 43m
- 13. Exponents and Polynomials3h 55m
- Review: Evaluating Exponents29m
- The Product Rule10m
- Intro to the Power Rules18m
- The Power of a Quotient Rule18m
- Negative Exponents28m
- The Quotient Rule13m
- Simplifying Exponential Expressions Using All Exponent Rules6m
- Intro to Polynomials21m
- Adding and Subtracting Polynomials20m
- Multiplying Polynomials33m
- Special Products34m
- 14. Factoring Polynomials2h 42m
- 15. Rational Expressions and Equations3h 13m
- 16. Relations and Functions2h 9m
- 17. Inequalities and Absolute Value2h 52m
- 18. Roots, Radicals, and Complex Numbers3h 57m
- 19. Quadratic Equations and Functions3h 1m
- 20. Exponential and Logarithmic Functions2h 31m
- 21. Conic Sections and Systems of Nonlinear Equations2h 24m
- 22. Sequences, Series, and the Binomial Theorem1h 45m
6. Ratio, Proportion, and Percent
Applications of Percent
Multiple Choice
A pair of running shoes costs \$80. The store is offering a 25% discount. Calculate the amount of discount and the sale price of the shoes.
A
Discount = \(25; sale price = \)55
B
Discount = \(20; sale price = \)80
C
Discount = \(20; sale price = \)60
D
Discount = \(25; sale price = \)60
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