Howi usually runs 75 miles each month. Last month he ran an extra 16 miles. How many miles did he run last month?
He usually runs 75 miles each month, and last month he ran an extra 16 miles. Therefore, he ran a total of 75 + 16 = <<75+16=91>>91 miles last month. Answer: \boxed{91}.
To find out how many miles Howi ran last month, you need to add his usual monthly mileage (75 miles) to the extra miles he ran (16 miles).
So, the total number of miles he ran last month is 75 + 16 = 91 miles.
To find out how many miles Howi ran last month, we need to add his usual monthly distance to the extra distance he ran.
Let's start by adding his usual monthly distance of 75 miles to the extra distance of 16 miles:
75 miles + 16 miles = 91 miles
Therefore, Howi ran 91 miles last month.