What is the percent of increase from 50 to 90?

A.
40%

B.
44%

C.
56%

D.
80%

Question

What is the percent of increase from 50 to 90?	
 
 A.
40%
 
 B.
44%
 
 C.
56%
 
 D.
80%

logan13 · Answer

@EclipsedStar  plz i beg hlp me plz

mathstudent55 · Answer

$percent~ change = \dfrac{new ~number - old ~number}{old~number} \times 100$

logan13 · Answer

math student i have 4 more

mathstudent55 · Answer

In your case, the new number is 90 and the old number is 50.

mathstudent55 · Answer

Ok, let's do them one at a time.
Use the formula above and  plug in 90 and 50 and figure it out.
Let me know what you get.

logan13 · Answer

40 %

logan13 · Answer

@EclipsedStar = thank u anyways

mathstudent55 · Answer

That's not correct.
Can you show me your numbers in the formula?

logan13 · Answer

okay i suck um like how i did it

mathstudent55 · Answer

Did you try it at all or did you just pick the first choice at random?

mathstudent55 · Answer

These are the numbers you should use in the formula:

$percent~ change = \dfrac{90 - 50}{50} \times 100$

mathstudent55 · Answer

What is 90 - 50 = ?

logan13 · Answer

50%

logan13 · Answer

40

mathstudent55 · Answer

Good.
Use a calculator now: what is 40/50 = ?

logan13 · Answer

80

mathstudent55 · Answer

40/50 = 0.8
Then 0.8 * 100 = 80
The answer is 80% increase