Question

The temperature during one day in Auckland decreases from 21°C to 17°C. Calculate the percentage decrease correct to 3 significant figures.

please i need a quick answer

Answer 1

19.04%

Explanation:

The temperature decreases from 21°C to 17°C.

We need to find the percentage decrease in the value of temperatures.

The percentage decrease in any value is given by :

`\%=\frac{|\text{initial value-final value}|}{\text{initial value}}* 100\\\\=(21-17)/(21)* 100\\\\=19.04\%`

So, the required percentage decrease is 19.04%.