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What is ratio used for?

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Anonymous

14y ago
Updated: 8/19/2019

A ratio is a relationship between two numbers of the same kind which explicitly indicates how many times the first number contains the second. It is used to enable us to calculate mixtures of materials, engineering applications or indicators for percentages.

Some examples of ratios are:

  • A classroom has 20 girls and 10 boys. The girls-to-boys ratio is 2:1
  • You buy a can of white wash to paint the fence. You have to add 1 part of water to 3 parts of paint. The paint-to-water ratio is 3:1 So, If you have 5 liters of paint you will need to mix the paint with about 1,7 liters of water.
  • A gearbox has a ratio of 1:7.25 This means when the input or drive shaft makes 1 full turn, the output makes 7.25 turns.
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Wiki User

14y ago

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