Los multiplos de 2 es 2,4 ,6,8,10,12,14, etc
Del 3: 3,6,9,12,15,18,21,24,27,30,etc
Del 5: 5,10,15,20,25,30,35,40,etc
11/50=1.1/5=0.22
They are indeed equivalent.
Divide 3/4 by 1/8 and you should get 6 hurdles.
The formula to find the amount is

Here A = amount
P is the principal
r is the rate
n is the number of years
Then to find the interest we subtract principal from amount.
Interest = A - P
Here
P= 2200, r = 3% = 0.03 , n = 6 years

Hence the interest earned = 2626.92-2200 = $426.92
Now if the total of $2200 was deposited in three banks then each account earns 
Each account earns $142.31