Answer:
Viruses are 2 times of the bacteria.
Step-by-step explanation:
Given:
Number of viruses =
Number of bacteria = 
We have to found how many times viruses are greater than the bacteria.
To find how many times,we can divide both the numbers to compare its values.
Lets
Numerator = Number of viruses
Denominator = Number of bacteria
Dividing both we have,
⇒ 
⇒
...
⇒
...
⇒ 
So the viruses are 2 times of the bacteria.
1) 2x+1x= 63
2) 3x= 63
3) 3x/3= 63/3
4) x= 21
5) 2(21)+1(21)=63
6) 42+21= 63
The 2 groups would be 42 to 21.
12.8-12.4=0.4
0.4 divide by 12.4 = 0.0322
0.0322 x 100 = 3.22%
Answer:
-1 1/2
same as -1.5 but since you are dealing with fractions you should put it in fraction form unless told otherwise.