7. 1,817
6 × 6 × 52
8. 456,976,000
26 × 26 × 26 × 26 × 10 × 10 × 10
9a. 25%
50% × 50%
9b. 4%
20% × 20%
9c. 10%
50% × 20%
9d. 2.5%
5% × 50%
10. 12/216 ~ 5.556%
1/6 × 3/6 × 4/6
11. 3.125%
50% × 50% × 50% × 50% × 50%
12. 15/144 ~ 10.417%
3/12 × 5/12
13. 56.25%
93.75% × 60%
14a. 45/600 = 7.5%
9/25 × 5/24
14b. 30/600 = 5%
6/25 × 5/24
