Thanks much sandeep800,

This shortcut formula will actually save lot of time. One question regarding this, what happens when the initial change is a decrease? I mean as per the given formula p1 is a decrease? Can you show one more example on that please?

HI Guys.

I found a good method while going thru a book in case u guys dont know!!!

suppose a questions says first the price of an article increase by 20% then after that price got reduced by 5%

normally we calculate seprately for some original price

like say

(1.2)x and then to calculate 5 % reduce we calculate 5% of (1.2)x

shortcut is we can calculate by formula (p1+/-p2)+/-((p1*p2)/100)

p1-->1st percentage

p2 -->2nd one

sign of + or - in first bracket depending on increase or decrease

in second bracket sign outside it will be product of initial sign of p1 and p2 like for both decrease +ve*-ve=-ve

i know u may find it difficult to cram but see an example u dont need to learn at all

sol for above eg

20-5-((20*5)/100)

15-1

14% of original value

another example

suppose length increase by 20% breadth by 30 % then overal area increase wil be 20+30+(20*30)/100)=56% more of original

..

we use -ve sign for reduction ,+ve for increase and if both are decrease then in product of p1*p2 part value will be +ve (since -ve*-ve=+ve)

Hope it help u guys..!!

thanx