Artie ate \( \frac{1}{5} \) of a box of cereal last week and \( \frac{1}{5} \) of a box more this week than last week. How much of Artie's box of cereal is left?

To determine how much of the cereal box Artie has left, let's break down the information step by step. 1. **Cereal Consumed Last Week:** - Artie ate \(\frac{1}{5}\) of the cereal box. 2. **Cereal Consumed This Week:** - He ate \(\frac{1}{5}\) **more** than what he ate last week. - This means he ate: \[ \frac{1}{5} \text{ (last week)} + \frac{1}{5} \text{ (additional)} = \frac{2}{5} \] 3. **Total Cereal Consumed:** - Adding both weeks together: \[ \frac{1}{5} + \frac{2}{5} = \frac{3}{5} \] 4. **Cereal Remaining:** - The whole cereal box is considered as 1 (or \(\frac{5}{5}\)). - Subtract the consumed portion from the whole: \[ 1 - \frac{3}{5} = \frac{2}{5} \] **Answer:** \(\boxed{\dfrac{2}{5}}\) of the cereal box is left.