Question

less for
240. Find the increased price as well as the original price per kg of sugar.--
10. A number is first increased by 20% and then decreased by 20%. What is the net
increase or decrease percent?
6 A​

Answer 1

Answer:

4% (decrease)

Step-by-step explanation:

(10): Let any number 'a'.

It is first increased by 20%:

= > a + (20% of a)

= > a + (20/100 of a )

= > a + (0.2a)

= > 1a + 0.2a

= > 1.2 a

Then, it is decreased by 20%:

= > 1.2a - (20% of 1.2a)

= > 1.2a - (20/100 of 1.2a)

= > 1.2a - (0.2 * 1.2a)

= > 1.2a - 0.24a

= > 0.96a

% decrease = (a - 0.96)/a 100%

= > (0.04a/a) 100%

= > 4%