Mathematics 26 Online
OpenStudy (anonymous):

20 pounds of a salt water solution contains 15 percent salt ,how much water must be added to weaken thesolution to 12percent salt?

So let's figure out first how much salt is in the water. If we have 20 pounds of salt water, and 15 percent of it is salt, we can find the amount of salt in the water by saying: $$0.15 * 20 = 3$$ So 3 pounds are salt and 17 pounds are water. Then we need 12 percent salt. We can set up an equality: $$\frac{3}{w} = \frac{12}{100}$$

There, $$w$$ is the amount of salt water (i.e., the total). We're saying 12 out of 100 is the same as 3 pounds out of how many total pounds. 12 out of 100 is because 12% is defined as 12 parts out of every 100. Does that make sense? Is that enough for you to find the answer?

OpenStudy (anonymous):

thank you it does :)

Awesome! :)

OpenStudy (anonymous):

:)

Latest Questions
Tbone: Edits ^-^
18 minutes ago 6 Replies 3 Medals
rose12345: look
6 hours ago 11 Replies 3 Medals
jessii: What are the pros and cons of being a flight attendant?
3 hours ago 4 Replies 1 Medal
SamRoman: What do y'all think of my Cover photo for my next YouTube video?
15 minutes ago 13 Replies 1 Medal
lovelygirl13: i made a collage of the color green
21 minutes ago 5 Replies 1 Medal
chrishale13840: would this be a good tattoo
10 hours ago 18 Replies 5 Medals