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A ratio 9:12 is to be written as an equivalent ratio of the form ?:20.
A student notices that 9:12 must first be simplified before scaling so the second term can become 20.
What is the correct first term?

Class 6Equivalent RatiosRatio and Proportion
  • A15
  • B16
  • C12
  • D18

Step-by-Step Solution

9:12 simplifies to 3:4. To make the second term 20, multiply by 5: and . So the first term is 15.
Answer: A) 15

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