Question

Rahul's salary is increased by 15% and then decreased by 15%. Find the net percentage change in this salary.

Answer 1

Answer:

Step-by-step explanation:

Let take his salary 100

Increased by 15%

15÷100×100=Rs15

Thus, his increased salary is Rs(100+15)=Rs115

Then, decreased by 15%

15÷100×115=Rs 17.25

Thus,his decrease salary is Rs(115-17.25)=Rs97.75

The net percentage change in his salary is

2.25÷100×100=2.25%

Hence,the answer is 2.5%.

Answer 2

Answer:

The net percentage is a net decrease of 2.25% in Rahul's salary after it was increased by 15% and then decreased by 15%.

Step-by-step explanation:

Let's assume Rahul's salary before the increase was Rs.100.

After the 15% increase, his salary will be Rs.115.

Now, when his salary is decreased by 15%, it will be decreased by 15% of Rs.115, which is Rs.17.25. So his final salary after the decrease will be Rs.97.75.

So we can see that his initial salary of Rs.100 has increased to Rs.115 after a 15% increase and then decreased to Rs.97.75 after a 15% decrease.

Now, to find the net percentage change, we can use the formula:

Net percentage change = ((Final value - Initial value) / Initial value) * 100

So substituting the values, we get:

Net percentage change = ((97.75 - 100) / 100) * 100

Net percentage change = -2.25%

So we can conclude that there is a net decrease of 2.25% in Rahul's salary after it was increased by 15% and then decreased by 15%.

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