Ratio and its applications

By the end you’ll be able to

• Simplify ratios (including with different units) and write them in the form $1 : n$
• Share a quantity in a given ratio and solve problems where the difference or one part is known
• Relate ratios to fractions and to linear functions, e.g. if $a : b = 3 : 5$ then $a = \frac{3}{5}b$
• Combine two ratios into a three-part ratio, and solve ratio problems that need algebra, e.g. ratios that change after an amount is added (Higher)