Houghton Mifflin Harcourt
Holt, Rinehart and Winston: Homework Help Independent Practice: Ratios and Proportions
Get independent practice working with ratios and proportions. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.
Wyzant
Wyzant: Proportion Basics
WyzAnt provides an explanation and examples on solving proportions. Proportions practice problems and a proportion calculator are included in this lesson.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Proportions
Find a quick, concise explanation of proportions. An example is given and clearly explained.