Both the 18 who gave up and 6 who were disqualified would be considered “did not complete the marathon” criteria. So add 18 with 6 to get the total which is 24.
Next to find the percentage yo would need to find what 24 is OF 340 meaning you need to divide 24 by 340. So you would get 24/340 which equal about 0.07. Turn 0.07 to 7%
