Percentages

[SteveLaura 0]

I'm doing stats at work. I hate stats. I hate percentages. I'm confused.

I need to show that Number A has increased by more than 25% to become Number B. I can work out what 25% of Number A is, then add that to it to make Number C. But I can't work out how to get Number B as a percentage of Number A.

To clarify somewhat:

Number A is 20

Number B is 26.

I know that Number B is more than 25% greater. But what percentage is it? What's the formula?

Cheers in advance.

Steve. Maths Dunce.

[Jenn! 918]

26/20 = 1.3 therefore, 26 is 30% greater than 20.

[SteveLaura 0]

Is it that simple? I feel so stupid.

In my defence, um, I am quite stupid. I just use big words sometimes to hide it.

Thank you unconditionally for your most felicitous response.

[Jenn! 918]

Is it that simple? I feel so stupid.

In my defence, um, I am quite stupid. I just use big words sometimes to hide it.

Thank you unconditionally for your most felicitous response.

You're welcome.

Oh and don't worry. This is definitely not the stupidest math question I've been asked (I used to be a math teacher).

[SteveLaura 0]

Phew. Cheers.

So, the next two numbers are 9 and 13.

13/9 = 1.4

1.4 as a fraction is...? (I fell asleep during these classes, obviously...)

[Jenn! 918]

Phew. Cheers.

So, the next two numbers are 9 and 13.

13/9 = 1.4

1.4 as a fraction is...? (I fell asleep during these classes, obviously...)

Well, 13/9 actually is 1.444444. Which means that 13 is 44.444% greater than 9.

1.444444444 as a fraction is, as you said, 13/9.

1.4 doesn't really have anything to do with the question, but 1.4 as a fraction is 7/5.

I think I have some fraction/percentages worksheet packets around somewhere... I can send you a copy.

Edited August 14, 2007 by jenn3539

[garya505 2]

I'm doing stats at work. I hate stats. I hate percentages. I'm confused.

I need to show that Number A has increased by more than 25% to become Number B. I can work out what 25% of Number A is, then add that to it to make Number C. But I can't work out how to get Number B as a percentage of Number A.

To clarify somewhat:

Number A is 20

Number B is 26.

I know that Number B is more than 25% greater. But what percentage is it? What's the formula?

Cheers in advance.

Steve. Maths Dunce.

A = 20

B = 26

The increase is:

B - A = 6

so the increase is 6/20 = 0.30 = 30%

or more simply stated:

percentage increase of A to B = 100 * ((B - A) / A)

[SteveLaura 0]

Phew. Cheers.

So, the next two numbers are 9 and 13.

13/9 = 1.4

1.4 as a fraction is...? (I fell asleep during these classes, obviously...)

Well, 13/9 actually is 1.444444. Which means that 13 is 44.444% greater than 9.

1.444444444 as a fraction is, as you said, 13/9.

1.4 doesn't really have anything to do with the question, but 1.4 as a fraction is 7/5.

I think I have some fraction/percentages worksheet packets around somewhere... I can send you a copy.

OK, I'm getting a cold sweat now. I'm 9 years old again and my Irish Maths teacher with the erratic temper is standing over me. He has a big red moustache. Urgh, I hate Maths.

So, the figure after the decimal point is the percentage? Why didn't they teach me this at school? I can understand that. It's not difficult. Bloody Irishman.

Thank you again.

[Jenn! 918]

Phew. Cheers.

So, the next two numbers are 9 and 13.

13/9 = 1.4

1.4 as a fraction is...? (I fell asleep during these classes, obviously...)

Well, 13/9 actually is 1.444444. Which means that 13 is 44.444% greater than 9.

1.444444444 as a fraction is, as you said, 13/9.

1.4 doesn't really have anything to do with the question, but 1.4 as a fraction is 7/5.

I think I have some fraction/percentages worksheet packets around somewhere... I can send you a copy.

OK, I'm getting a cold sweat now. I'm 9 years old again and my Irish Maths teacher with the erratic temper is standing over me. He has a big red moustache. Urgh, I hate Maths.

So, the figure after the decimal point is the percentage? Why didn't they teach me this at school? I can understand that. It's not difficult. Bloody Irishman.

Thank you again.

Math teachers *are* scary.

To convert any decimal to a percentage, just multiply by 100, or move the decimal point 2 places to the right.

.5 = 50%

2.5 = 250%

.04 = 4%

So 1.444444444 is 144.444444% (or in the context of the problems that you're working, a 44.44444% increase)

[mawilson 2,133]

Well, 13/9 actually is 1.444444(...). Which means that 13 is 44.444(...)% greater than 9.

SteveLaura,

Just in case you weren't confused enough, that's an infinite number of 4's after the decimal point

[Trompe le Monde 1,107]

(Number B-Number A)/Number A * 100 is my excel formula

[*JG* 2]

Wow, when I told someone you could find answers for EVERYTHING on here, I must've really meant it. You guys are killing me with this today.

[Jasman0717 9]

My head is spinning

[SteveLaura 0]

OK, I think I've got it.

If you ever go to a Maths Teachers convention and see an Irishman with a big, red moustache, probably in his 50s, who says his name is Mr. Hughes - kick him.

Cheers.

[Niels Bohr 72]

Easy stuff. Engineers deals with math about 1000000x difficult than this than. These are very basic just like 1+1=2. Next time, don't blame engineers for making faulty bridges, and tunnels. It's already hard enough to build them correctly.