A common complaint I hear from teachers is that there is never enough practice for trickier math subjects like fractions. This is especially true for teachers who are trying to avoid "just teaching the tricks" to really ensure their students have rock-solid conceptual understanding before showing short cuts. One of the biggest places I see this is when it comes to going between mixed and improper fractions.
This sheet is great for some quick practice after students have become familiar with the topic. I would use this for morning work after students finish unpacking or as an exit slip for the end of the day when pack up is complete.