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Stells [14]
3 years ago
7

What % of 40 is 15? Please put how u do it

Mathematics
2 answers:
andriy [413]3 years ago
6 0

Answer:

37.5

Step-by-step explanation:

so x% of 40 is 15

the equation for that is

x/100 * 40 = 15

40x/100 = 15

multiply 100 on both sides

40x = 1500

divide 40 on both sides

37.5

37.5% of 40 is 15

telo118 [61]3 years ago
6 0

Answer:

37.5

Step-by-step explanation:

Just do 15 out of 40 and divide 15 by 40 for the answer.

40/15

add a zero to the 15

40 goes into 150 3 times (40*3= 120)

150-120=30

40 doesn't go into 30 so you add another 0 which makes it 300

40 goes into 300 7 times

300-280= 20

40 doesn't go into 20 so add another zero (200)

40 goes into 200 5 times (40*5=200)

37.5

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A certain genetic condition affects 8% of the population in a city of 10,000. Suppose there is a test for the condition that has
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4. Total =800 +92 +8=900

5. Probability (as a percentage) that a person has the condition if he or she tests positive= As 8% are found positive among 10,000 means 9200 are not found affected.But there are chances that out of 9200 , 1% may be affected

=\frac{\text{1 percent of 9200}}{9200}\\\\ \frac{\frac{1}{100}\times 9200}{9200}=\frac{92}{9200}\\\\ =0.01

that is Probability equal to 0.01 or 1%.

7 0
3 years ago
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