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Ratio and Rate. Section 5.1. Objectives. Write a fraction that shows a ratio comparison of two like measurements Write a fraction that shows a rate comparison of two unlike measurements Write a unit rate. Objective 1: Write a fraction that shows a ratio comparison of two like measurements.

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ratio and rate

Ratio and Rate

Section 5.1

objectives
Objectives
  • Write a fraction that shows a ratio comparison of two like measurements
  • Write a fraction that shows a rate comparison of two unlike measurements
  • Write a unit rate
objective 1
Objective 1
  • Numbers can be compared by subtraction
  • Can be compared by division
  • Ratio is comparison by division
  • Common ways to write ratio.

30:10

30 ÷ 10

30 to 10

  • First number to be compared is first number written or is the numerator. Second number second or is the denominator.
objective 11
Objective 1
  • Ratios written as fractions can be simplify, if possible
  • Like measurements have same unit of measure
  • Units are dropped in ratio with like measurements
objective 2
Objective 2
  • Fraction comparing unlike measurements is called a rate
  • Rate can be simplified
  • Units are NOT dropped
objective 3
Objective 3
  • Unit rate – rate rewritten so denominator is 1-unit measurement
  • To write a unit rate
    • Divide
    • Keep unlike units