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True [87]
3 years ago
13

6.5 kg to 3.9 kg, what was the percent decrease

Mathematics
1 answer:
igomit [66]3 years ago
6 0

Answer: 40%

Step-by-step explanation:

Given,

Initial mass = 6.5kg

final mass = 3.9kg

So, Change in mass = initial mass - final mass

                                  = 6.5 - 3.9

                                  = 2.6 kg

and,

Change in percentage of mass = \frac{change in mass}{original mass} * 100

Change in percentage of mass = \frac{2.6}{6.5} * 100

                                                    = 40

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2 years ago
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Fittoniya [83]

Answer:

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Step-by-step explanation:

For any problem, word problem or otherwise, you start be reading and understanding the problem. You should specifically look for

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Here, you're asked to find a savings account balance. You're told that $345 is half that amount.

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After you decide what you're looking for and the given relevant information, you use the problem statement and your personal knowledge to write one or more equations relating what you know to what you want to find.

A first step for doing this is to define any necessary variables. In this problem, we can use "s" for the original savings balance (in dollars). (I like to choose letters that remind me what they stand for. "x" or "y" can sometimes get mixed up. For a one-variable problem, it doesn't really matter what you call it. It is helpful to be clear about the units of measure of any variables. Confusion there can also lead to errors.)

The problem statement tells us that half the savings account amount is $345, so our equation is ...

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