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Sindrei [870]
3 years ago
10

Mrs. Kemp began the school year with 20 students in her kindergarten class. She had 23 students at the end of the year. What was

the
percent of increase in the number of students from the beginning of the year to the end of the year?
Mathematics
1 answer:
Liula [17]3 years ago
3 0
First, we’re going to use this formula:

2nd number - 1st number
————————————— x 100%
1st number


If we plug in the numbers to this equation:

23-20
———- x 100%
20

And subtract 23 to 20, the answer to this equation is:

3
—- x 100% = 15%
20

In this case, the percent of increase is 15%.
You might be interested in
What fraction of 7 2/5 is 49 1/3?
Digiron [165]

Answer:

8 1/6 / 1 7/8 = 196/45 = 4 16/45 ≅ 4.3555556

Step-by-step explanation:

Conversion a mixed number 8 1/6

to a improper fraction: 8 1/6 = 8 1/6 = 8 · 6 + 1/6= 48 + 1/6 = 49/6

To find new numerator:

a) Multiply the whole number 8 by the denominator 6. Whole number 8 equally 8 * 6/6 = 48/6

b) Add the answer from previous step 48 to the numerator 1. New numerator is 48 + 1 = 49

c) Write a previous answer (new numerator 49) over the denominator 6.

Eight and one sixth is forty-nine sixths

Conversion a mixed number 1 7/8

to a improper fraction: 1 7/8 = 1 7/8 = 1 · 8 + 7/8 = 8 + 7/8= 15/8

To find new numerator:

a) Multiply the whole number 1 by the denominator 8. Whole number 1 equally 1 * 8/8 = 8/8

b) Add the answer from previous step 8 to the numerator 7. New numerator is 8 + 7 = 15

c) Write a previous answer (new numerator 15) over the denominator 8.

One and seven eighths is fifteen eighths

Divide: 49/6 : 15/8 = 49/6 · 8/15 = 49 · 8/6 · 15 = 392/90 = 2 · 196 /2 · 45 = 196/45

Dividing two fractions is the same as multiplying the first fraction by the reciprocal value of the second fraction. The first sub-step is to find the reciprocal (reverse the numerator and denominator, reciprocal of 15/

8 is 8/15

) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. In the next intermediate step , cancel by a common factor of 2 gives 196/45

.

In words - forty-nine sixths divided by fifteen eighths = one hundred ninety-six forty-fifths.

8 0
3 years ago
Gracie is shipping a cube shaped box. It measures 14 in x 14 in x 14 in. What is the surface area of the box. Please show work)
Aliun [14]
So you do length times width and in your case it would be 14 times 14 = 196
6 0
3 years ago
Is the percent increase from 50 to 70 equal to the percent decrease from 70 to 50? Explain.
PIT_PIT [208]

Answer:

No. The amounts of change are the same, but the original amounts are different.

6 0
3 years ago
Read 2 more answers
I need helpppppo!!! (: yes
Hatshy [7]

Answer:

2/5

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Solve the given equation.<br><br> w<br> −<br> 19<br> =<br> 47
butalik [34]

Answer:

w=66

Step-by-step explanation:

w-19=47

Hey There!

So what we want to do is get the variable on one side (w) and the constant on the other

so essentially what I am saying is that we have to get rid of the -19 and to do that we have to add 19

but remember whatever we do to one side we have to do to the other

-19+19 cancels out

47+19=66

therefore

w=66

7 0
3 years ago
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