To convert $2.5$ hours into minutes, we start with the understanding that there are $60$ minutes in one hour. This is a fundamental unit conversion that is frequently applied in everyday scenarios as well as in various mathematical contexts.

To determine how many minutes are in $2.5$ hours, we use the following calculation:

We can break this down further by considering $2.5$ hours as the sum of $2$ hours and $0.5$ hours. Let’s convert each part step-by-step.

First, we convert the $2$ hours:

Next, we convert the $0.5$ hours:

Now, we can combine the results from both conversions:

Thus, we confirm that $2.5$ hours equals $150$ minutes.

This step-by-step approach can be particularly beneficial when dealing with more complex time conversions or when you simply want to verify your calculations. Mastering these basic conversions is crucial for solving a variety of problems in GCSE Maths, whether they pertain to time management, scheduling, or even certain physics applications.