The lines around the numbers mean that we are trying to find the absolute value of the numbers inside the lines and compare them to each other.
Absolute value is the total distance from zero so a negative number had the same absolute value as its positive counterpart. (EX. |-83| = |83|)
By knowing this information we can determine that the absolute value of -83 is 83 and the absolute value of -82 is 82 so B would be the correct answer.
The answer would be twenty five percent because four and one half is equal to seventy-five percent and one hundred minus seventy-five would be twenty-five.