All of the following are equivalent except: 5 is to 3; 45/27; 15/5; 7.5: 4.5

it is 15/5

Step-by-step explanation

all of the answers except 15/5 you can divide by one number, 5 is to 3 is like 45 divided by 9 and 3 is like 27 divided by 9. Plus 15/5 is a Improper fraction so that is obviously the right answer.

20%

step-by-step explanation:

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: