How do you increase a number by a certain percentage ?

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hi
i'm having small doubt ...

how to increase the amount by the certain percentage..

for example

the amount between $47,196-$57,947 should be increase by the percentage 2%

and for $57,948-$82,253 should be increase by the percentage 3% .

can any one tell how to write logic to dis...

Posted 29-Oct-11 3:16am

surikarthi

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Sergey Alexandrovich Kryukov 29-Oct-11 23:03pm

Off-topic.
--SA

2 solutions

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Henning Dieterichs · Accepted Answer · 2011-10-29T03:18:00

Solution 1

That is simple math...

C#

double amount = 57.947 - 47.196;
double newAmount = amount * 1.02;

Posted 29-Oct-11 3:18am

Henning Dieterichs

Updated 29-Oct-11 3:19am

v2

I.explore.code · Accepted Answer · 2011-10-29T03:39:00

Solution 2

if "X" is to be increased by "Y%", then the new value of X would be:

X' = (X + ((Y * x)/100)). This should make it clear.

Posted 29-Oct-11 3:39am

I.explore.code

Comments

Henning Dieterichs 30-Oct-11 7:14am

assuming x = X = amount and newAmount = X':
newAmount = amount * (1 + (Y / 100)) which is exactly the same I wrote (1 + Y / 100 = 1.02 if Y = 2)

I.explore.code 30-Oct-11 10:17am

I just tried to make it more explicit for the questioner.