Lesson Notes By Weeks and Term v4 - JHS 1
Fractions, Decimals a nd Percentages
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Fractions, Decimals a nd Percentages
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: Mathematics
Class: JHS 1
Term: 1st Term
Week: 11
Grade code: B7.1.3.1.2
Strand code: 1
Sub-strand code: 3
Content standard code: B7.1.3.1
Indicator code: B7.1.3.1.2
Theme: NUMBER
Subtheme: Fractions, Decimals a nd Percentages
This page supports the lesson note with a companion video and a short classroom-ready summary.
For class groups and homework, share this lesson page so learners also get the summary, objectives, and full lesson context.
In our daily lives in Ghana, we are constantly faced with numbers in different forms. At the market, a seller might offer a discount as "20% off," while another says "take GH₵0.50 off every GH₵2.00." When you write a test, your teacher might give your score as 40/50. Which is a better discount? What is your score as a percentage? This lesson is crucial because it gives us the tools to understand and compare these different ways of representing parts of a whole. By learning to convert between fractions, decimals, and percentages, we can make smarter decisions about money, understand our academic performance better, and solve many real-world problems.
The Challenge: Comparing Different Forms Imagine your friend Kofi scored 17/20 on a Maths test, and you, Ama, scored 82% on the same test. Who performed better? It's difficult to tell immediately because the scores are in different forms (a common fraction and a percentage).
To compare them, we need to convert them into the same form. The easiest way is to convert all numbers to either decimals or percentages.
Method 1: Converting Everything to Decimals (The Most Reliable Method)
This is often the simplest and most direct method for comparison. Common Fraction to Decimal: Divide the numerator by the denominator. *Example:* Convert 3/4 to a decimal. Calculation: `3 ÷ 4 = 0.75` Percentage to Decimal: Divide the percentage by 100 (or simply move the decimal point two places to the left). *Example:* Convert 65% to a decimal. Calculation: `65 ÷ 100 = 0.65`