# Aptitude - Aptitude-Percentage

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Raman's salary was decreased by 50% and subsequently increased by 50%. How much percent does he loss?

• a
• b
• c
• d

Let the origianl salary = Rs. 100

It will be 150% of (50% of 100)
= (150/100) * (50/100) * 100 = 75

If number x is 10% less than another number y and y is 10% more than 125, then find out the value of x?

• a
• b
• c
• d

A housewife saved Rs. 2.50 in buying an item on sale. If she spent Rs. 25 for the item, approximately how much percent she saved in the transaction?

• a
• b
• c
• d

Actual Price = Rs.25 + Rs.2.50 = Rs.27.5

Saving = Rs.2.5
Percentage Saving = 2.527.5×100=25027.5=2500275=10011=9111%≈9%

How many litres of pure acid are there in 8 litres of a 20% solution?

• a
• b
• c
• d

Question of this type looks a bit typical, but it is too simple, as below...

It will be 8 * 20/100 = 1.6

10% of inhabitants of a village having died of cholera, a panic set in, during which 25% of the remaining inhabitants let the village. The population is then reduced to 4050. Find the original inhabitants?

• a
• b
• c
• d

Let the total number is x,
then,

(100-25)% of (100 - 10)% x = 4050
=> 75% of 90% of x = 4050
=> 75/100 * 90/100 * x = 4050
=> x = (4050*50)/27 = 6000

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