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 Strand 3: Mathematical and Problem=Solving Skills ALS Learning Activity Sheet. Learning Atrand 3: Mathematical and Problem Solving Skills Base, Rate and Percentage Rate, Base and Percentage Fraction, Decimal, Percent