A man sells a chair and a table, both at same price of Rs. 4000 each and is neither gaining nor losing in the deal. If he sold the chair at profit of 25% then he sold table at loss of?

10% of 100 = 10
New price = 110

Again, 10% of 110 = 110 x (10/100) = 11
New price = 110 + 11 = 121

? Required increment = 121 - 100 = 21

Given, a = 20%
Required percentage = [a/(100 - a)] x 100%
= [20/(100 - 20)] x 100%
= (20/80) x 100%
= 25%

Saving = 20%
Expenditure = 80% = ?6000

Since 80% is 6000 so 20% would be 6000/4 = ?1500
Hence net saving per month = ?1500

Total marks obtained = (76 + 48 + 84 + 38 + 72) = 318
Maximum marks = 5 x 100 = 500
? Requirred percentage = (318/500) x 100 % = 63.6 %

Let the maximum marks be N .
According to the question,
Then, 780 - 728 = 5% of N
? 52 = 5% of N
? N = 5200/5 = 1040

Let salary be Rs. A, then A - 15 % of A - 30% of 85% of A = 2380
? A - 15A/100 - (30 x 85 x A)/(100 x 100) = 2380
? 200A - 30A - 51A = 2380 x 200
? 119A = 2380 x 200
? A = (2380 x 200)/199 = 4000

Let his income be Rs. N, then N - 5% of N - 20% of 95% of N = 1919
? N - N/20 - (20 x 95 x N)/(100 x 100) = 1919
? N - N/20 - 19N/100 = 1919
? 100N - 5N - 9N = 191900
? N = 191900 / 76 = 2525

? 137¹/₂% of N = 33
? {(275/2) x N} / 100 = 33
? N = (33 x 2 x 100) / 275 = 24

? 72¹/₂% of N = 87
? {(145/2) x N} / 100 = 87
? N = (87 x 2 x 100) / 145 = 120

Let third number be N
Then, first number = 70% of N = 7N/10 and,
Second number = 63% of N = 63N/100
Difference = 7N/10 - 63N/100 = 7N/100
? Required percentage = (7N/100) x (10/7N) x 100 % = 10%