Calculating 10% of 20% of 25% of 100

To calculate 10% of 20% of 25% of 100, we need to break down the calculation step by step.

Step 1: Find 25% of 100
To find 25% of 100, we multiply 100 by 0.25, which gives us 25.

Step 2: Find 20% of 25
To find 20% of 25, we multiply 25 by 0.20, which gives us 5.

Step 3: Find 10% of 5
To find 10% of 5, we multiply 5 by 0.10, which gives us 0.5.

Final Calculation
So, 10% of 20% of 25% of 100 is equal to 0.5.

Explanation

Calculating percentages involves finding a fraction of a number. In this case, we are given a series of percentages to calculate.

The first step is to find 25% of 100. To do this, we multiply 100 by the decimal form of 25%, which is 0.25. This gives us 25.

Next, we need to find 20% of 25. We multiply 25 by the decimal form of 20%, which is 0.20. This gives us 5.

Finally, we need to find 10% of 5. We multiply 5 by the decimal form of 10%, which is 0.10. This gives us 0.5.

Therefore, 10% of 20% of 25% of 100 is equal to 0.5.

Key Points:
- To find a percentage of a number, multiply the number by the decimal form of the percentage.
- When calculating multiple percentages, calculate them step by step, starting from the innermost percentage and working outward.
- Pay attention to the decimal forms of the percentages. For example, 25% is equal to 0.25 in decimal form.
- Keep track of the decimal places and make sure to round your final answer if necessary.