Using Percents


This chapter presents a variety of practical uses of percents. Students will learn about enlargements and reductions, discounts, sales tax, simple interest, and commission. The chapter ends with a lesson on percent change.

What you can expect to learn

After completing these activities you should be able to

  1. Find the percent by which a copy is enlarged or reduced.
  2. Find discounts and sale prices.
  3. Calculate sales tax and total cost.
  4. Calculate simple interest and the balance in an account including the interest.
  5. Calculate commissions, sales amounts, and earnings.
  6. Calculate the percent of change.
Activity List