How to Calculate a Percentage of a Number

Math with Mr. J

This instructional math video provides a clear, step-by-step tutorial on how to calculate the percentage of a specific number. The instructor, Mr. J, demonstrates that finding a percent of a number is essentially a multiplication problem where the word "of" translates to the multiplication operation. He introduces two distinct methods for solving these problems: converting the percentage into its fraction form (per 100) or converting it into its decimal form before multiplying by the target number. The video explores key mathematical themes including the relationship between percentages, fractions, and decimals. It emphasizes the concept of equivalent fractions (simplifying 50/100 to 1/2) to make mental math easier. The tutorial progresses through three specific examples increasing in complexity: finding 50% of 16, 25% of 20, and 65% of 15. This progression allows students to see how the rule applies to both clean integer answers and answers involving decimals. For educators, this video serves as an excellent direct instruction tool or review resource for middle school math curriculums. It effectively models procedural fluency and offers multiple strategies for solution finding, catering to students who may prefer working with fractions over decimals or vice versa. The visual walkthrough on a chalkboard background helps focus student attention on the calculation steps, making it easy to pause and practice alongside the video.