Percentages - Percentages of an amount (focus on 50, 25, 10 and 1 percent only) - Presentation

In a comprehensive lesson on percentages, students are taught how to calculate percentages of amounts, with a specific focus on 50%, 25%, 10%, and 1%. The lesson utilises the concept of fractional equivalences to help students understand how percentages relate to fractions. For example, 50% is shown to be equivalent to 1/2, and to find 50% of a number, one simply divides by 2. The lesson slides guide students through interactive activities, prompting them to complete sentences that help them connect percentages to their fractional equivalents and the corresponding division operations. For instance, to find 25% of an amount, one would divide by 4, as 25% is equivalent to 1/4.

Further activities involve using bar models to visualise the percentages of different amounts, making it easier for students to grasp the concept and calculate percentages quickly. For example, to find 50% of 408, students learn that dividing 408 by 2 yields 204. The lesson also encourages students to solve problems mentally, such as calculating 10% of a number by dividing it by 10. Reasoning exercises challenge students to correct misconceptions, such as the incorrect belief that to find 25%, one must divide by 25, when in fact it requires division by 4. The lesson concludes with independent work where students apply their knowledge to various problems, reinforcing their understanding of how to find specific percentages of given amounts.