Please help! It’ll give you 43 points!

0.4 ÷0.08 = 5  

See the attachment for graphic model.

Also see long division next to the model.

Step-by-step explanation:

You have a quantity of four tenths. You are breaking it down into groups of eight hundredths. How many groups can you make?

Remember that 4 tenths is the same as 40 hundredths, so the problem can be restated as 40 (hundredths) divided by 8 (hundredths)

40 ÷ 8 = 5

For the model, make 10 columns. Shade or color 4 of them to show 4/10.

Measure a unit that is 8/100 wide, and mark that off.

Count how many sections are marked off. Circle or alternately shade them.

I used a centimeter ruler, so each centimeter represents one tenth, each millimeter represents one hundredth.

As you mark off the increments of 8 (multiples: 8,16,24,32,40) that fills and divides the space between 0 and 4 tenths with 5 widths of 8/100.

I hope this helps. It's complicated!

853.3

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional