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Maths Standard Form Grade 9 Question watch

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    Okay so there's a really complicated maths question that has me and my friends in a pickle. It's a really hard question about standard form. I'd really appreciate anyone who could help with it. The question is:

    The Heron Sea has a volume of 1.4x10 to the power of 12 litres, of which 12% is salt. The Cobalt Sea has a volume of 8.5x10 to the power of 12 litres of which 8% is salt. What is the percentage decrease in the volume of salt from the Heron Sea to the Cobalt Sea? Give your answer to 2 decimal places.
 
 
 
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