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...for what may lead to a life altering association!
Here is a set of free short videos for stepwise preparation of Ratio, Proportion, and Variation on GMAT. For a more detailed treatment of the topic, you may want to opt for our GMAT online course or our GMAT test series of 15 mock tests.
A Key Concept on Proportion
the Concept of "Variation" or "Proportionality"
