Learning goals: Teacher Facing Explain (orally and in writing) how to solve problems involving the percentages 10%, 25%, 50%, and 75% by reasoning about the fractions $\frac{1}{10}$, $\frac14$, $\frac12$, and $\frac34$. Generalize (orally) processes for calculating 10%, 25%, 50%, and 75% of a quantity. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 6.3 Unit Rates and Percentages, Grade 6.