Percent in Word Problems: Applying Common Sense
This clip stresses the importance of using common sense to determine if an answer is correct. "Usually, when you set up the proportion wrong," the clip explains, "the answer comes out really impossibleÂ…you know right away you've made a mistake."
Percent in Word Problems: Practical Problems Involving Percent and Proportion
This clip establishes that percent means comparing something to 100, then presents a number of practical problems about percentage that are solved by setting up proportions and cross-multiplying.
Percent in Word Problems: Summary: Percent in Word Problems
This clip summarizes the material presented in the lesson on percent in word problems. It touches on several of the key terms and concepts, including proportions and cross-multiplying. It also mentions some of the special words that come up in busin...
Percent in Word Problems: Reviewing Proportion
This clip reiterates that proportion is the key idea in all work with percent. The clip notes that while there may be quicker ways to handle a percent problem, we can always get started with this type of problem by setting up a proportion because, "...
Percent in Word Problems: Few Problems Involving Money, A
This clip consists of word problems having to do with money, and the student is introduced to terms like discount and commission. Otherwise, the problems are very similar to others already presented, and are solved by setting up proportions and then...
Percent in Word Problems: Setting Up the Proportion and Determining What's Being Compared to What
This clip explains that the most important part of setting up a proportion is figuring out what number is being compared to what other number.
Percent in Word Problems: Problem About Profit, A
This clip explains that percent problems involving money sometimes include special words which need to be understood. In this case, the words are: "profit" and "original cost." Otherwise, the setting up of proportions and cross-multiplying are done ...
Solving a Complicated Principal, Rate, and Interest Problem
Two loans with different interest rates and terms are compared to find the one that fits with the borrower's budget for interest.