What is 4.875 in expanded form using fractions

4 x 1 + 8 x 1/10 + 7 x 1/100 + 5 x 1/1000 = 4.875

To write this in expanded form, you just need to break down the number by place value and add them up together. The problem asks you do to this in fraction form.

Here is a table you can refer to when you are looking at numbers with decimals:

Ones Tenths Hundredths Thousandths

1 . 1/10 1/100 1/1000

4 . 8 7 5

Expanded form:

Fraction:

4 x 1 + 8 x 1/10 + 7 x 1/100 + 5 x 1/1000 = 4.875

Decimal:

4 + 0.8 + 0.07 + 0.005 = 4.875

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

the answer would be  

a.

3: 1

step-by-step explanation: