



 
Hi Charon. Ratios are fractions, and so are percentages. For example, And when you have a fraction of a percentage, then you have a fraction of a fraction, so you can think of it as multiplying by the inverse of the reciprocal of the denominator, like this: I presume by the double colon, you mean equals. So the question is really asking this: Try simplifying the fractions first, then isolate x, then "invert and multiply" to find the answer. Cheers,  


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