Lesson 6-1

Understanding Percents

Obj: To model percents and to write percents using equivalent ratios

• HWK: p 276-277 1-9 all• 15-30 all

• Vocab: 1) percent

2 ways to change Fraction to Percent (%)

• 1) Write as an equivalent fraction with a denominator of 100 – the new numerator is your %.

• 2) Divide denominator into numerator, add decimal and 0’s until terminates or repeats. Then change decimal to % by moving decimal right 2 digits.

• Ex 1) The floor plan shows a bedroom with an area of 100 ft². Find the percent of floor space needed for each piece of furniture.

• Bed = Desk = Bureau =

Desk

Bed

Bureau

10 ft

• Ex 2) Write a ratio and a percent to represent the unused floor space.

Write a ratio and a percent for each shaded area

• Ex 3) Ex 4)

• Ex 5)

Ex 6) You take a quiz that has 20 questions and get only 3 incorrect answers. What is your percent grade on the

quiz?