SAT Ratios and Proportions: Complete Guide
How to solve SAT ratio and proportion questions by setting up clean cross-multiplication and spotting unit conversions.
Set Up the Proportion
Write both ratios with units labeled above each number. Matching units have to stay on the same side. If they don't, you've set up the proportion backwards.
Unit Conversion Traps
SAT frequently mixes miles and kilometers, or minutes and hours, inside a single ratio problem. Always convert both sides to the same units before cross-multiplying.
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