Math Is Fun Forum

Hannibal lecter

Member

Registered: 2016-02-11

Posts: 392

addition between two number

what is the different between  :-

10% + 5

and

5 + 10%

why the result is different values?

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Wisdom is a tree which grows in the heart and fruits on the tongue

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

Re: addition between two number

What do you mean? They're one and the same. Or is there a typo?

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Hannibal lecter

Member

Registered: 2016-02-11

Posts: 392

Re: addition between two number

calculate it on google and you will understand my problem

10% + 5 = 5.1

5 + 10% = 5.5

when I did that on google

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Wisdom is a tree which grows in the heart and fruits on the tongue

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

Re: addition between two number

Oh, Google interprets "5 + 10%" as 5 + "10% of 5", then.

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Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.

Hannibal lecter

Member

Registered: 2016-02-11

Posts: 392

Re: addition between two number

and is that right?

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Wisdom is a tree which grows in the heart and fruits on the tongue

Bob

Administrator

Registered: 2010-06-20

Posts: 10,640

Re: addition between two number

10% + 5
and
5 + 10%

The sum is badly stated as it is not clear whether it means "add another 5% to 10%' or 'find 10% of something and then add another $5 to that'

It's interesting that google gives two different answers.  It seems that it treats 5 + 10% as (5+10)%.  Which is correct depends on what the question is.  I have made up two questions here; one answer is correct for one question; and the other answer is correct for the second question.

question 1.  A man is told he will get a 10% increase in wages.  But then the boss decides to be more generous and make it 5% more than he originally said.  What is the percentage increase now?

question 2.  A money lender offers to lend money using the following rule to work out how much extra you have to pay when you pay back the loan: 10% of the amount borrowed plus $5.  How much does the loan cost?

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
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