Question

On august 1 ,2009 a supplier increased the price of product by 25%. On August 15 , 2009 he decrease the price by 16%.If the price of product on august 15,2009 is Rs 63.What was the price of july 31 2009

Answer 1

RS 59.3

Step-by-step explanation:

Aug 15 price = Aug 1 old price * 125%* 84%

Aug 15 price = Aug 1 old price *106.25%

We already have Aug 15 price as RS 63

RS 63 = Aug 1 old price * 106.25%

RS 63/106.25% = Aug 1 old price

RS 59.3 = Aug 1 old price which is the price at July 31 2009

Answer 2

The answer is Rs 60

Step-by-step explanation:

Lets suppose the price of July 31 2009 as "X"

At the first change

"X" was increased by 25%

Which means X * (1+25%)= 1.25X

Then in the second change the price was decreased by 16%

Which means 1.25X * (1-16%)= 1.25X * 0.84

Lets complete the equation as we know the price after second change which is Rs 63

63= 1.25X * 0.84

1. 63/0.84 = 1.25X

2. 75/1.25 = X

3. 60 = X

4. Hence the price at July 31 2009 was Rs 60