Calculating Percent of a Number Using Proportion Model

This video tutorial teaches how to calculate a percent of a number using a proportion model. It explains the concept of proportions, provides a real-world example involving an ice cream survey, and demonstrates how to find the scale factor and calculate the unknown value. The tutorial also covers verifying the solution using a bar model and addresses common misunderstandings in setting up proportions.

What steps would you take to solve for the unknown part in a percent proportion?

Describe how to check if the calculated answer is reasonable using a bar model.

What common misunderstanding do students have when setting up proportions?