# Blood

In the human body, the blood is about 7.3% body weight. How many kilograms of blood are in the human body with a weight of 109 kg?

## Correct answer:

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### You need to know the following knowledge to solve this word math problem:

**arithmetic**- multiplication
- division
**basic functions**- ratio
- percentages
- reason
- direct proportionality
**numbers**- fractions

### Units of physical quantities:

### Grade of the word problem:

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