Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Proporcionalidad
In Spanish. In this unit you will practice proportion. You will be able to distinguish whether quantities are or not in proportion and solve problems of direct and indirect proportion.
Mocomi & Anibrain Digital Technologies
Mocomi: Ratio and Proportion
Gives examples of ratios and proportions and how to solve them.