SOLUTION: directions call for mixing 8 ounces of powder to 51 gallons of water, I only need enough powder for 5 gallons of water. How much powder do I use?

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Question 803248: directions call for mixing 8 ounces of powder to 51 gallons of water, I only need enough powder for 5 gallons of water. How much powder do I use?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Set up a ratio
+8+%2F+51+=+x+%2F+5+
+5%2A8+=+51%2Ax+
+51x+=+40+
+x+=+.784+
0.784 ounces of powder should be used