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amm1812
3 years ago
13

81 is 37.5% of what number?

Mathematics
1 answer:
laila [671]3 years ago
3 0

Hi,

81 is 37.5% of 216.

"1. We assume, that the number 37.5 is 100% - because it's the output value of the task.  

2. We assume, that x is the value we are looking for.  

3. If 100% equals 37.5, so we can write it down as 100%=37.5.  

4. We know, that x% equals 81 of the output value, so we can write it down as x%=81.  

5. Now we have two simple equations:

1) 100%=37.5

2) x%=81

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

100%/x%=37.5/81

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 81 is what percent of 37.5

100%/x%=37.5/81

(100/x)*x=(37.5/81)*x       - we multiply both sides of the equation by x

100=0.46296296296296*x       - we divide both sides of the equation by (0.46296296296296) to get x

100/0.46296296296296=x  

216=x  

x=216                          "

Have a great day!

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Answer:

Hello, Your answer will be

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part c: 1/15, about 6.67%                                                  

<em>Have a Great Day!</em>

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Answer: the height of the water after the sphere is placed in

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h represents the height of the cylinder.

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Total volume of the sphere and the cylinder = 6280 + 4186.67 = 10466.67 cm^2

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3 years ago
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