More or less concept

**Problem 1:** A reduction of 25% in the price of the sugar enables a person to purchase 4kg more for 800 RS. Find the original and current price per kg?

Solution: Let the original price = x

Reduced price =

Original price

Reduced price=

Shortcut: 25%

4-3=1

1 4

3 3*4=12

4 4*4=16

**Problem 2:** Due to 30% increase in the price of apples, 6 apples are less available for RS 520. Find the new price and the old price of an apple?

Solution :30%

3 6

1 2

13*2=26

10*2=20

old price=20 new price=26