One of a series of pre-apprenticeship phase 1 training modules dealing with math skills, this self-paced student module covers ratio and proportion. Included in the module are the following: cover sheet listing module title, goals, and performance indicators; introduction; study guide/check list with directions for module completion; information sheet; self-assessment; self-assessment answers; and post assessment. Emphasis of the module is on types of problems encountered in the skilled trades. (Other related pre-apprenticeship phase 1 training modules are available separately--see note.) (MN)