Please help and get it right. Please explain.

D is the answer

Step-by-step explanation:

4/20 = 0.2

9/10= 0.9

1/2= 0.5

-3= -3

Negatives always are going to be the least number

D

Step-by-step explanation:

First, you put the negtive first because they are always the smallest. Next you can make all the fraction to the same bottom number. that will make 2/10, 9/10, and 5/10. Now you put 2/10 (4/20) 2nd. Third, will be 5/10 (1/2). Last, fourth will be 9/10. it will look like this  -3, 4/20, 1/2, 9/10. This will be D.

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632

i think it might be a but you might want a second opinion