If we want to use red to yellow in ratio 3:5 and we know we have to use 20 oz of yellow we can say that our 5 from the ratio represents 20 oz. So we can divide it by 5 to find how much oz is 1 and then multiply it by 3 to find amount of red. 20:5=4 [oz] 4*3=12 [oz] - amount of red
So on a paper you write: 3:5 since the yellow is 5 u put. 20 under the 5 now you can cross multiply(20•3=60) and now divide 60 by 5 which is 12
To maintain the red to yellow ratio of 3 to 5 with 20 ounces of yellow paint, you need to use 12 ounces of red paint. This is calculated by using the ratio to determine the amount of red necessary for the given amount of yellow. Thus, mix 12 ounces of red with the 20 ounces of yellow.
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