SOLUTION: Sam has a 10 gallon paint can with a mixture of 90% paint and 10% water. Sam needs an 80% 20% mixture. How much water does Sam needs to add? I know the answer is 1.25 gallons. I do
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Question 859700: Sam has a 10 gallon paint can with a mixture of 90% paint and 10% water. Sam needs an 80% 20% mixture. How much water does Sam needs to add? I know the answer is 1.25 gallons. I don't understand how this answer was calculated. I am trying to help my son, any help would be appreciated. Answer by josgarithmetic(39617) (Show Source):
You can put this solution on YOUR website! Main interest is about percent paint, starting with 10 gallons of 90% paint.
Let y = volume of water to use, to add to the 10 gallons of paint, to obtain 80% paint.
Only one needed equation.
Solve for y.
Percents were used, although the equation could have been done completely as decimal fractions.
It that equation as shown, enough for your son, or is more explanation or steps needed?
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