Question #4245c

1 Answer
Feb 11, 2017

Answer:

4.39 was added to Anna's purchase.

Explanation:

We can rewrite this as: What is 5% of the sum of 40.50 and 28.90 and 18.45?

"Percent" or "%" means "out of 100" or "per 100", Therefore 5% can be written as #5/100#.

When dealing with percents the word "of" means "times" or "to multiply".

Finally, lets call the number we are looking for "n".

Putting this altogether we can write this equation and solve for #n# while keeping the equation balanced:

#n = 5/100 xx (40.50 + 28.90 + 18.45)#

#n = 5/100 xx 87.85#

#n = 439.25/100#

#n = 4.39#