To convert degrees Fahrenheit (F) to degrees Celsius (C), you can use the following equation:
\[ C = \frac{F - 32}{1.8} \]
To convert 77°F to Celsius using this formula, plug in the value:
\[ C = \frac{77 - 32}{1.8} \]
Now calculate it step by step:
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Subtract 32 from 77: \[ 77 - 32 = 45 \]
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Divide the result by 1.8: \[ C = \frac{45}{1.8} \approx 25 \]
Thus, 77°F is approximately 25°C.