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larisa86 [58]
3 years ago
9

By what percent will a fraction increase if its numerator is decreased by 60% and its denominator is decreased by 20%?

Mathematics
1 answer:
inna [77]3 years ago
8 0

9514 1404 393

Answer:

  -50%

Step-by-step explanation:

Suppose the fraction is f = p/q before any changes.

Decreasing the numerator by 60% multiplies it by (1 -0.60) = 0.4.

Decreasing the denominator by 20% multiplies it by (1 -0.20) = 0.8.

Then the new fraction is ...

  f' = p(0.4)/(q(0.8)) = (p/q)(0.4/0.8) = f(0.5) = f(1 -0.50) = f(1 +(-50%))

The increase in the value of the fraction is -50%.

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A sphere has a diameter of 1.2 meters. The sphere increased the diameter by 0.2 meters. What percent increase is the radius of t
Tasya [4]
So, the sphere went from 1.2 meters to 1.4 meters.
The radius will always be half of the diameter. So it went from .6 to .7.
Let's divide and see what percent .7 is of .6.
.7÷.6=1.166666666(repeating 6).
This means, it increased by about 16.7%, since it was not doubling, just going up.

4 0
4 years ago
I have 1/3 of a pie. You have 1/3 of a pie. Add the pieces of pie together. How much pie do we have?
aliya0001 [1]

Answer:

2/3

Step-by-step explanation:

To add fractions add the numbers on top to each other and leave the bottom numbers alone if they are the same number.

\frac{1}{3}+\frac{1}{3}=\frac{1+1}{3}=\frac{2}{3}

8 0
2 years ago
After the fine arts booster club's soup supper, there were 120 pieces of pie left over. The leftover pie was distributed equally
Ne4ueva [31]

Answer: Your answer is 12

Step-by-step explanation:

120/(6+4)=X

120/10=X

120/10=12

12=X

8 0
3 years ago
Pls answer also no explanation no brainliest.
soldier1979 [14.2K]

Answer:

i belive the answer is the option c

3 0
3 years ago
Read 2 more answers
If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen
adell [148]

Answer:

option D

2x − 7(−3x − 17) = 4

Step-by-step explanation:

Given in the question two equations

<h3>Equation 1</h3>

2x - 7y = 4

<h3>Equation 2</h3>

3x + y = -17

Rearranging equation 2 in terms of y

3x + y = -17

y = -17 - 3x

Put this value of y in Equation 1

2x - 7y = 4

2x - 7(-17 - 3x) = 4

So,

If you use the substitution method to solve the following system, new equation will be

<h3>2x - 7(- 3x - 17) = 4 </h3>

3 0
3 years ago
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