My Math Forum What percentage of the mixure is water?

 Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion

 October 13th, 2014, 09:28 PM #1 Senior Member     Joined: Jan 2012 Posts: 745 Thanks: 7 What percentage of the mixure is water? If 3 gallons of spirit containing 20% water are added to 5 gallons of another spirit containing 15% water, what percentage of the mixure is water? How do I tackle this problem?
 October 13th, 2014, 09:54 PM #2 Global Moderator     Joined: Oct 2008 From: London, Ontario, Canada - The Forest City Posts: 7,958 Thanks: 1146 Math Focus: Elementary mathematics and beyond $\displaystyle \frac{0.6+0.75}{8}=0.16875$
 October 13th, 2014, 10:12 PM #3 Senior Member     Joined: Jan 2012 Posts: 745 Thanks: 7 How did you do it?
 October 13th, 2014, 10:22 PM #4 Global Moderator     Joined: Oct 2008 From: London, Ontario, Canada - The Forest City Posts: 7,958 Thanks: 1146 Math Focus: Elementary mathematics and beyond 20% of 3 is 0.6. 15% of 5 is 0.75. Adding these gives how much water is in 8 gallons of the mixture.
 October 13th, 2014, 11:17 PM #5 Senior Member     Joined: Jan 2012 Posts: 745 Thanks: 7 I got 16.875%.
 October 13th, 2014, 11:20 PM #6 Global Moderator     Joined: Oct 2008 From: London, Ontario, Canada - The Forest City Posts: 7,958 Thanks: 1146 Math Focus: Elementary mathematics and beyond That's correct.
 October 13th, 2014, 11:44 PM #7 Senior Member     Joined: Jan 2012 Posts: 745 Thanks: 7 Thank you.

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# If 3 gallons of spirit containing 20% water are added to 5gallons of another spirit containing 15% water, what percentage of the mixture is water?

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