Calculate 10% of 80:
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Calculate 10% of 80:
To solve this problem, we'll follow these steps:
Let's go through each step:
Step 1: Convert the percentage to a decimal. Since we are given 10%, we convert it to 0.10. This is done by dividing the percentage by 100: .
Step 2: Multiply the decimal by the whole number, 80:
.
Step 3: Therefore, 10% of 80 is 8.
The correct multiple-choice answer is option 1, which is 8.
8
Calculate 30 over 100 as a percentage:
Percent means 'per hundred' - so 10% literally means 10 out of 100, which equals . This conversion step is essential for calculations!
Yes! Since 10% = 0.10, you can simply move the decimal point one place to the left. For 80, move the decimal: 80.0 becomes 8.0, so 10% of 80 is 8.
Same process! Convert 25% to decimal: , then multiply. For 25% of 80: 0.25 × 80 = 20.
Use mental estimation! 10% should be much smaller than the original number. Since 10% of 80 = 8, this makes sense because 8 is indeed much less than 80.
You can, but understanding the conversion helps you solve problems without a calculator and catch mistakes. Plus, some calculators work differently with percentage keys!
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