Question

An arborist examined trees in an orchard to see if they were infected with a virus. Out of 90 trees, 40% had the virus. How many trees were infected with the virus?

Answer 1

36 trees were infected with the virus.

Explanation:

Given:

Total number of trees = 90

Percentage of tree that had virus 40%

To find:

Number of tress that were infected by virus = ?

Solution:

Let the number trees that was affected by the virus be X.

then

X = 40% of 90

X =
`(40)/(100) * 90`

X =
`0.4 * 90`

X= 36