4: Business Math
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- 4.1: Ratio and Proportion
- Examples and applications of ratios are limitless: speed is a ratio that compares changes in distance with respect to time, acceleration is a ratio that compares changes in speed with respect to time, and percentages compare the part with the whole. We’ve already studied one classic ratio, the ratio of the circumference of a circle to its diameter, which gives us the definition of π.
- 4.2: Introduction to Ratios and Rates
- We use ratios to compare two numeric quantities or quantities with the same units.
- 4.3: Introduction to Proportion
- In this section, we equate ratio and rates in a construct called a proportion.
- 4.5: Percent, Decimals, Fractions
- So, when you hear the word “percent,” think “parts per hundred.”
- 4.8: Percent Increase or Decrease
- A person’s salary can increase by a percentage. A town’s population can decrease by a percentage. A clothing firm can discount its apparel. These are the types of applications we will investigate in this section.