Lesson 1 of 3
A percent is a ratio that compares a number to 100. The symbol % is used to show a percent. Keep reiterating this point to students. Ideally, percent’s should come at the end of RP lessons and after NS.1 so students have worked with strip diagrams before.
Provide benchmarks for strip diagrams determined by the factor pairs that make 100. Factor pairs of 100, number of (boxes) x (percentage worth of each box)
1x100, 2x50, 4x25, 5x20, and 10x10.
This lesson includes:
This is the first of a series of 3 lessons on percent’s. Here we ask students to find the percent of a quantity.
The lesson problems for this lesson are:
At the Triumph dealership 60% of the motorcycles are black. If there are 240 motorcycles at the dealership, how many of them are black?
[Demonstrate using a 20% model]
At this dealership, 45% of the motorcycles are next years model. How many motorcycles are next years model? How many are this years model?
[Demonstrate using a 10% model and split between the 40% and 50% box.]