Curtis threw 15 darts at a dartboard. 40% of his darts hit the bull's eye. how many darts not hit the bulls eye?

9

Step-by-step explanation:

The number of darts that failed to hit the bulls eye is 40% of 15 subtracted from 15

Since 40% of the darts hit the bulls eye.

Therefore

40% of 15

40/100 x 15

0.4 x 15

6

This means that 6 darts hit the bulls eye.

Therefore, number of darts that did not hit the bulls eye is

15 - 6 = 9

9 darts failed to hit the bulls eye