I'm learning the exact same thing so give me some question and I can see what I can do!
1/5 is greater because it equals 0.2
0.2 has an imaginary 0 at the end, to make it 0.20
.20 > 0.15
Therefore, 1/5 is greater than 0.15
The answer is NO,because if you put 3 CDs or less in each shelf you only can put 15 (3*5=15), the same reason for both questions.
Answer: 70
Step-by-step explanation: 10 dimes = a dollar
10 x 7 = 70 dimes
