Pls me solve the question i need to finish quickly

Determine the fraction of total interest owed. after the fourth month of a 12-month loan: the numerator is: {(n + ) + (n + ) + (n + ) + (n + )} = , and the denominator is: {(n) + (n + 1) + + (n + )} = . therefore, the fraction is numerator/denominator (to the nearest tenth) =

I’m still confused on how to work the percentages

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?