There is not much that can be done to figure out how to write .73 as a fraction, except to literally use what the decimal portion of your number, the .73, means. Since there are 2 digits in 73, the very last digit is the "100th" decimal place. So we can just say that .73 is the same as 73/100.
Since the lines are parrallel, the angle underneath the one you are finding is equal to 65. To find the total value of (x+72) you subtract 65 from 180, giving you 115.
