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Alpha Teach Yourself Algebra I in 24 Hours by Jane Cook

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Hour 14
Ratios and Proportions: Mixture and Work Problems
Ratios, proportions, and percents help you solve many different practical problems, from adjusting a recipe’s ingredients to comparing the time you spend on the phone at work to the time you spend in meetings. In this next hour, you will learn additional ways percents are useful when analyzing change, whether it’s the change in the price of an item that’s now on sale or the change in your utility bills from one month to the next. You will also be able to calculate not only the amount of different items needed to make a certain mixture, but also the amount of time it will take to get a job done if others help you. Algebra is the key to all these real-life problems, even though they ...

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