Percents can be challenging to use in real life! With these logical lessons, worksheets, and follow-up task cards, students will be able to mentally calculate common percentages adults use every day for things like tip, tax and sales. This lesson covers CCSS 7.RP.A.3.These lessons are designed so your students can work independently through a series of scaffolded practice problems. Lesson 1: The first lesson shows students how to find 10% mentally and then extends to 1%. These percentages becom