A gallon of water weighs 8 and 1/3. How much does 1 and 1/5 gal of water weigh? *I think its 8 1/15*

Question

mathstudent55 · Answer

1 and 1/5 gal is how much more than 1 gal?

mathstudent55 · Answer

Before we get there, let's look at your answer to see if it is right or wrong.

What is more, 1 gal or 1 1/5 gal?

anonymous · Answer

1  1/5 gal

mathstudent55 · Answer

Good.
1 gal of water weighs 8 1/3 lb.
Since 1 1/5 gal is more than 1 gal, then 1 1/5 gal of water should weigh more than 1 gal of water, right?

anonymous · Answer

right

mathstudent55 · Answer

Now look at your answer. You said 8 1/15.
What is more 8 1/3 or 8 1/15?
Since the first 8 is the same as the other 8, all we need to compare is 1/13 and 1/15.
What is more, 1/3 or 1/15?

anonymous · Answer

8 1/3 definitely

anonymous · Answer

so 1/3 is more

mathstudent55 · Answer

Correct.
Then how can more water (1 1/5 gal instead of 1 gal) weigh less (8 1/15 lb instead of 1 1/3 lb) ?

anonymous · Answer

I guess my answer was wrong. How do I find out the answer though?

anonymous · Answer

got it the answer is 10! thanks for helping

mathstudent55 · Answer

Correct.