You have to find the least common denominator then compare numerators after you determine the factor by which you must multiply your denominators by in order to make them equal. Then apply the same factor to the numerators.
3/10 * 9/9 = 27/90
5/9 * 10/10 = 50/90
77/90 which is about 3/4 mile!
The percentage of A occurring is 25%
<u>Explanation:</u>
Given:
4 sections are there
M A T H
number of spins, n = 20
In one spin, the probability of getting A is 1/4
In 20 spins, the probability of getting A is

Percentage of A occuring = 
= 25%
The unit rate is 75¢. 7.50 divided by 10 (oranges) is the $0.75 or 75¢