Question

a no. first increased by 20% and then decreased by 25 %. find the net increase or decrease pertage ​

Answer 1

Answer:

The net decrease percentage is 4%

Step-by-step explanation:

Assume that the number is 100. Then, 20% of 100 is  

20×100/100  = 20.

Increasing 100 by 20% means increasing 100 by 20 and the resultant number is 120.

Now the new number is 120 x 20% of 120 is

= 20×120/100  = 120/5 = 24.

Thus decreasing 120 by 20% means the same as subtracting 24 from 120 and the resultant number will be 120 - 24 = 96.  

Since 96 is less than 100, the original number, net decrease  

=100−96100×100  

=4100×100

=4  

Thus the net decrease is 4%. It is true for all other numbers.

*Hope it helps...you Mate*

*And please mark me the brainliest...*