Anna attended 7 out of 10 gymnastic practices last month. Which ratio compares the number of practices Anna did NOT attend to the total number of practices?

Responses
A 310
3 10
B 73
7 3
C 37
3 7
D 710

The number of practices Anna did NOT attend is 10 - 7 = 3.

So the ratio of practices she did NOT attend to the total number of practices is 3:10.

Therefore, the answer is A) 3:10.

To find the ratio that compares the number of practices Anna did NOT attend to the total number of practices, we can subtract the number of practices attended from the total number of practices and express it as a ratio.

Number of practices Anna did NOT attend = Total number of practices - Number of practices attended
= 10 - 7
= 3

Ratio of practices Anna did NOT attend to the total number of practices = 3 : 10

Therefore, the correct ratio is C) 37 : 7.