Answer:
Explanation:
1. Get the amount of rocks in tons that the company used in the second month. To do this, you must subtract the amount they used in the first month by the total amount used.
Rocks used in first month: 3 1/2 tons
Total amount used : 7 1/4 tons
7 1/4 tons - 3 1/2 tons
To subtract, convert into improper fractions
((7*4)+1)/4 tons - ((3*2)+1)/2 tons
29/4 tons - 7/2 tons
then convert the denominator into the same number. To do this just multiply 2/2 onto the second fraction
7/2 * 2/2 = 14/4
subtract
29/4 - 14/4 = 15/4 tons used on the second project.
2. Now that we know that 15/4 or 3 3/4 tons where used on the second month we just simply divide by the 5 projects that used the same amount of rocks.
To divide, we can just multiply 5 to the denominator of our improper fraction
15/4 * 1/5 = 15/20
Then we simplify
3/4 tons of rock were used for each project.