so you find the difference in how many shots he takes per 18 holes vs how many shots it takes the average person. It takes him 8 less (85-77). now find the approximate number of rounds it would take landon to get to 100 shots difference 13x8=104. So it looks like it will be 13 rounds, lets check. 77x13=1001 and 85x13=1105. There is 104 difference in between. So you answer will be 13 full rounds or 12 rounds and one half round. It seems you are looking for a specific answer so your answer is 13
Have a nice day brainliest would be fantastic