Five grams of sugar are added to a 45-gram serving of a breakfast cereal that is 20% sugar. What is the percent concentration of sugar in the resulting mixture?
sugar + sugar = sugar
0.20 * 45 + 5 = x(45+5)
Multiply by 100 on both sides, we get
20*45 + 500 = 100 * x * (50)
900 + 500 = x * 5000
1400 = x * 5000
x = 1400/5000
x = 14 / 50
x = 0.28
percent concentration of sugar = x = 28 %
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