To find the number of midsized cars in the parking garage, we need to determine 70% of 300 vehicles.
The equation to express this mathematically would be:
\[ \text{Number of midsized cars} = 0.7 \times 300 \]
Now, let's evaluate the given options to see which one relates correctly to this calculation.
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Option 1: \[ \frac{300 \div 3}{70 \div 3} = \frac{100}{23.3} \]
- This does not correctly represent the calculation of 70% of 300.
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Option 2: \[ \frac{100 \div 3}{300 \div 3} = \frac{33}{100} \]
- This also does not represent the calculation for 70% of 300.
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Option 3: \[ \frac{70 \times 3}{300 \times 3} = \frac{210}{900} \]
- Simplifying this gives \( \frac{70}{300} \), which is equivalent to 70%, but it doesn't directly represent the 70% of 300 itself.
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Option 4: \[ \frac{70 \times 3}{100 \times 3} = \frac{210}{300} \]
- This simplifies to \( \frac{70}{100} \) which is 70%, but still does not directly express the calculation of finding the number of midsized cars.
None of these options directly give the formula for finding the actual number of midsized cars (i.e., \( 0.7 \times 300 \)). However, the closest equation that relates to the 70% is Option 4 because it correctly represents the ratio of midsized cars (% of total).
Thus, while none of the options gives a completely accurate calculation of the number of midsized cars, Option 4 is the most related to the concept of 70% of a value.