Gabriela drank 3/4 of her glass of milk and Jenny drank 6/8 of her glass of milk. If the glasses were the same size, did they drink the same amount? Use cross multiplication to prove your answer.

They drank the same amount of milk

Step-by-step explanation:

Equivalent Fractions

Given the fractions

They are equivalent if:

Using cross-multiplication:

ad = bc

We are given Gabriela drank 3/4 of her glass of milk and Jenny drank 6/8 of hers. If both glasses were the same size, we can find if they drank the same amount of milk by proving:

Using cross-multiplication:

3*8 = 4*6

Since 24 = 24 is true, we can say they drank the same amount of milk

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