Simon and jory worked together to put up a fence in the back yard. together
it took them 8 hours to complete. simon was only able to for 6 hours.
what percent of the 8 hours was simon able to ?

The percent increase is 25%

Use pythagorean’s theorem and find the missing side lengths of the two smaller triangles and add them together
13^2 - 12^2 = 5
15^2 - 12^2 = 9
5+9 = 14
14 is the length of each side of the square
14^2 + 14^2 = 19.8
19.8 is the diagonal length of the inside if the square