To easily figure out how much something has increased in percentage, you can follow these simple steps. This method is clear and easy to understand.

First, you need to know the original value and the new value after the increase.

1. Identify the Values:

   • Let’s call the original value $O$.
   • The new value after the increase will be $N$.

2. Calculate the Increase:

   • To find out how much the value has gone up, you subtract the original value from the new value:
     $\text{Increase} = N - O$

3. Calculate the Percentage Increase:

   • To show this increase as a percentage of the original value, use this formula:
     $\text{Percentage Increase} = \left( \frac{\text{Increase}}{O} \right) \times 100$

4. Example:

   • Let’s say your original value is $50$, and the new value is $75$.
   • First, find the increase:
     $\text{Increase} = 75 - 50 = 25$
   • Next, calculate the percentage increase:
     $\text{Percentage Increase} = \left( \frac{25}{50} \right) \times 100 = 50\%$

   So, there is a 50% increase from the original value of $50$ to the new value of $75$.

5. Double-Check:

   • It’s important to double-check your math to make sure it’s correct.
   • Make sure you clearly understand both the original and new values. This will help you calculate the percentage increase reliably.

This simple method helps students connect math to real-life situations, like money matters or statistics, while also building their skills with fractions, decimals, and percentages in Year 7 Mathematics.