Content
13 modules
Rating
Course length
0 mins
Instructor
eLearning RJG®, Inc.
Released
11 Feb 2026
Description
The Percent Change and Variation unit of RJG's Math for Molders course teaches the formulas used to calculate percent change and percent variation, which can be used when building, optimizing, or troubleshooting an injection molding process.
The lessons feature practical examples related to plastic injection molding, opportunities for practice, and an assessment.
Suggested Prerequisite Math for Molders: Averages (Unit 6)
1.
Percent Change and Variation - Introduction (en v3.0) (Approximately 1.5 Minutes)
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2.
Percent Change - Explanation (en v3.0) (Approximately 7 Minutes)
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3.
Percent Change - Molding Application (en v3.0) (Approximately 4 Minutes)
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4.
Percent Change - Break It Down (en v3.0) (Approximately 3 Minutes)
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5.
Percent Change - Practice (en v3.0) (Approximately 10 Minutes)
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6.
Percent Change - Activity (en v3.0) (Approximately 10 Minutes)
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7.
Percent Change - Quiz (en v3.0) (Approximately 10 Minutes)
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8.
Percent Variation - Explanation (en v3.0) (Approximately 3 Minutes)
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9.
Percent Variation - Molding Application (en v3.0) (Approximately 4 Minutes)
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10.
Percent Variation - Break It Down (en v3.0) (Approximately 3 Minutes)
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11.
Percent Variation - Practice (en v3.0) (Approximately 10 Minutes)
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12.
Percent Variation - Activity (en v3.0) (Approximately 10 Minutes)
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13.
Percent Variation - Quiz (en v3.0) (Approximately 10 Minutes)
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