In this lesson, we will look at conversion of units for speed. Before that, let’s first look at the unit…
Speed
Speed tells us how fast something is moving. It is the rate at which distance is covered. There are many…
Proportion
A proportion is a statement that two ratios are equal. For example, if we say that 3 pencils cost 60…
Proportion Questions with More than 2 Quantities
So far, when we solve proportion questions, we usually deal with 2 quantities. However, some proportion problems can involve 3…
Rate
Rate tells us how a quantity changes with respect to time. When you see the word “per”, it usually refers…
Problems Involving Percentages
Here are some problems involving percentages from past exam papers. Chung Cheng High 2017 Mid Year Paper Q20 Worked Solutions…
Reverse Percentage
Reverse percentage is the process of finding the original amount after a percentage increase or decrease has been applied. Example on…
Percentage Point
A percentage point is the arithmetic difference between two percentages. Percentage Point Example: The interest rate last year was 2%,…
Percentage Increase or Decrease and Application to Sales
In this lesson, let’s look at finding percentage increase or decrease in a quantity. This is common in real-life situations…
Percentages Greater than 100%
When we express A as a percentage of B, we’ll take \( \frac{A}{B} \times 100\% \) Hence, we will have…