Welcome to the “Business Math Toolkit: Ratios” video lesson intended to instruct learners on when and how to use ratios in business. This lesson is part of the “Business Math Toolkit,” which guides learners in basic math skills they may need to leverage for their job. Throughout this lesson, viewers will learn about part-to-part ratios and part-to-whole ratios and learn how to gauge whether fractions are equivalent. Learners will also become familiar with proportions, cross multiplication, and unit rate.