What is 13.5+5.7+36.5 using mental math

Angela rode his bike around a bike trail that was 1/4 of a mile long he rode his bike around the trail 8 * angelo says he wrote a total of 8/4 miles to russell says he's wrong and he actually and says that he actually wrote to my who is corrupt use words and trying to explain how you know.

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

Write 17/20 as a decimal and as a percent.