Rule of Three: Direct & Inverse Proportion, Mix Ratios and Work Rates
This lesson is part of the course
In this lesson
You solve a direct and an inverse proportion, split a mix by its ratio and combine two work rates – the four rule-of-three patterns behind most practical test questions.
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Lessons in this course
- Number Sense: Order of Operations, Rounding & Quick Estimates Locked
- Fractions & Decimals: Converting, Simplest Form, Adding and Fractions of Amounts Locked
- Percentages: Percent Of, Percent Change, Discounts & Surcharges and Reverse Percentages Locked
- Rule of Three: Direct & Inverse Proportion, Mix Ratios and Work Rates Locked
- Units: Length, Area, Volume, Mass & Time with a Unit Table Locked
- Areas & Volumes: Rectangles, Triangles, Circles, Cylinders and Composite Shapes Locked
- Word Problems: Money, Speed–Distance–Time, Mixtures and Step-by-Step Solutions Locked
- Timed Mock Tests: Two Exam-Style Sets, a Score Sheet and a Weak-Topic Report Locked