Understanding Percent DLP Gr. 6 Module 51: Solving word problems involving commission DLP Gr. 6 Module 52: Solving word problems involving simple interest DLP Gr. 6 Module 50: Solving word problems involving a percent of increase and decrease ALS Learning Activity Sheet. Learning Atrand 3: Mathematical and Problem Solving Skills Base, Rate and Percentage Fraction, Decimal, Percent Lesson Guide – Elementary Mathematics Grade 6: Chapter II – Rational Numbers, Comprehension of Percent Math 6 DLP 47: Finding the rate or percent when the percentage and base are given