If 20% of a number is added to 90, then the result is the same number. 80% of the same number is:
If 20% of a number is added to 90, then the result is the same number. 80% of the same number is:
यदि किसी संख्या का 20% में 90 जोड़ने पर परिणाम वही संख्या प्राप्त होती है, तो उसी संख्या का 80% कितना होगा?
Detailed Solution & Logic
Correct Answer:
90
Solution:
Let the number be $x$.
According to the question,
$90 + 20% \text{ of } x = x$
$90 + 0.2x = x$
$90 = x - 0.2x$
$90 = 0.8x$
$x = \frac{90}{0.8} = 112.5$
Now,
$80%$ of the number
$= 0.8 \times 112.5 = 90$
Answer: 90
Similar Practice Questions
The number of subscribers increased consistently by 10% yearly: 5000, 5500, 6050, 6655, and 7320.
The number of subscribers increased consistently by 10% yearly: 5000, 5500, 6050, 6655, and 7320....
Three persons ran for office and got, 1136, 7636 and 11628 votes, respectively. What was the winning candidate’s percentage of the total votes?
Three persons ran for office and got, 1136, 7636 and 11628 votes, respectively. What was the...
If you lend ₹4,000 to your friend for 2 years at 5% annual compound interest rate, then how much amount (in ₹) will your friend return after 2 years?
If you lend ₹4,000 to your friend for 2 years at 5% annual compound interest...
In an examination, there were three papers of Mathematics, two papers of English and one paper of Science. All papers were of 100 marks. S got 60% in Mathematics, 70% in English and 50% in Science. What was his percentage of marks in all papers?
In an examination, there were three papers of Mathematics, two papers of English and one...
Rahul’s monthly expenditure is 75%
Rahul’s monthly expenditure is 75% of his monthly income. If the monthly savings are ₹10,000,...
An Online retailer offers a Rs.150 discounts on an item originally priced at Rs. 1200. What percentage discount is being offered?
An Online retailer offers a Rs.150 discounts on an item originally priced at Rs. 1200....
A trader claims to sell vegetables at a profit of 57%, but also dishonestly uses a weight which is 13% less than what is mentioned on it. Find the total percentage of profit earned by the trader. (Round off the answer to the nearest whole number.)
A trader claims to sell vegetables at a profit of 57%, but also dishonestly uses...