In converting the temperature from Celsius to Fahrenheit the formula is F = (9/5)C + 32.

Steps of converting from Celsius (°C) to Fahrenheit (°F)

**Step I**

Multiply the number of degree by 9.**
Step II**

Divide the product by 5.

**Step III**

Add 32 to the result

**1.** Convert 40 °C to the Fahrenheit scale.

**Solution:**

*Step I*: Multiply the number of degree by 9.

= 40° × 9

= 360°

*Step II*: Divide the product by 5.

= 360° ÷ 5

= 72°

*Step III*: Add 32 to the result.

= 72 + 32

= 104° F

Therefore, 40° C = 104° F

**2.** Convert 30°C to the Fahrenheit scale.

**Solution:**

*Step I*: Multiply the number of degree by 9.

= 30° × 9

= 270°

*Step II*: Divide the product by 5.

= 270° ÷ 5

= 54°

*Step III*: Add 32 to the result.

= 54 + 32

= 86° F

Therefore, 30° C = 86° F

**3.** Convert 75°C to the Fahrenheit scale.

**Solution:**

*Step I*: Multiply the number of degree by 9.

= 75° × 9

= 675°

*Step II*: Divide the product by 5.

= 675° ÷ 5

= 135°

*Step III*: Add 32 to the result.

= 135 + 32

= 167° F

Therefore, 75° C = 167° F

**4.** Convert 20°C to the Fahrenheit scale.

**Solution:**

*Step I*: Multiply the number of degree by 9.

= 20° × 9

= 180°

*Step II*: Divide the product by 5.

= 180° ÷ 5

= 36°

*Step III*: Add 32 to the result.

= 36 + 32

= 68° F

Therefore, 20° C = 68° F

**Converting the Temperature from Celsius to Fahrenheit.**

**Converting the Temperature from Fahrenheit to Celsius.**

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