Hey there! Welcome! Today, we are going to explore percentages, which are just a super friendly way of showing parts of a whole.
Have you ever heard someone say they are '100% sure' about something? The word 'percent' literally means 'per hundred' or 'out of 100'. It is like dividing any group or object into 100 equal, tiny pieces.
Imagine a grid of 100 squares. If we color in 50 of those squares, we have colored in 50% of the grid. That is exactly half of it!
Because percents are always out of 100, they are closely related to fractions. For example, 25% is the same as 25/100, which simplifies to 1/4 of the whole thing!
✏️ Worked example
Find 25% of 40.
Remember that 25% is the same as the fraction 25/100.
Simplify the fraction 25/100 by dividing the top and bottom by 25. This gives us 1/4.
Now, find 1/4 of 40 by dividing 40 by 4.
40 divided by 4 equals 10. So, 25% of 40 is 10!
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