An arborist examined trees in an orchard to see if they were infected with a virus. 6 out of 40 trees were infected with the virus. What percentage of the trees were infected?

Question

Write your answer using a percent sign (%).

Answer 1

To find the percentage of trees that were infected with the virus, you can use the following formula:

\[ \text{Percentage} = \left( \frac{\text{Number of infected trees}}{\text{Total number of trees}} \right) \times 100 \]

In this case, the number of infected trees is 6, and the total number of trees is 40. Plugging in the values:

\[ \text{Percentage} = \left( \frac{6}{40} \right) \times 100 \]

Calculating the fraction:

\[ \frac{6}{40} = 0.15 \]

Now multiply by 100:

\[ 0.15 \times 100 = 15 \]

Therefore, the percentage of trees that were infected is:

\[ \text{Percentage} = 15% \]

So, the answer is 15%.