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Anonymous
To know how much in weight 5% of something is, you need to know the weight you're starting from. 5% of 100 g is 5 g. 5% of 20 g is 1 g.
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1 MG
1ml of water is 1 g or 1000 mg % = 5/1000 x 100 = 0.5%
5% equates to 50,000 ppm
50%
What percent is 5 out 55