In This Chapter You Will:
●Write fractions, decimals, and ratios
as percents
●Find a percentage, a percent, and an
original number (or base)
●Write fractions and decimals greater
than 1 or less than 0.01 as percents
●Find a percent increase or
percent decrease●Calculate sales tax, tips, discounts,
markups, profit, loss, sale prices,
and commissions
●Use a formula to find simple interest
●Use a table to find compound interest
●Apply the strategy: Reason Logically
●Look for new vocabulary words
highlighted in each lesson●A ratio is a comparison of two
numbers, or like quantities,
by division.
●A rate is a ratio that compares two
unlike quantities, such as miles per
hour or dollars per week.●A proportion is an equation stating
that two ratios are equivalent.●The Cross-Products Rule states
that, in a proportion, the product of
the means equals the product of
the extremes.For Chapter Support:If , b 0
and d0, then
adbc.c
da
b- Skills Update Practice
- Practice Activities
- Audio Glossary
- Vocabulary Activities
- Calculator Activities
- Enrichment Activities
●Electronic SourceBook
Critical Thinking
Game Connection was selling virtual reality
headgear for off the usual price of $1500. Murphy’s
Electronics was selling the same headgear for 0.75
of their usual price of $1600. Yukiko bought the
headgear at Game Connection. Her friend Malik
bought the headgear at Murphy’s Electronics.
Who spent more money on the headgear, Yukiko
or Malik?1
5Chapter 7 173