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morpeh [17]
4 years ago
8

I NEED HELP ASAP HELP ME NOW

Mathematics
1 answer:
EleoNora [17]4 years ago
8 0
A change from 20 to 40 is a 100% increase because the original number was 20. Then, 20 was added to that. So, you are adding the whole number (100%) to itself. 

A change from 40 to 20 is a 50% decrease because 40 is being reduced to half of itself (50%). 

I hope this helps!
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Based on the information given in the question, the total cost will be:

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