A's salary is 20% less than B' s salary. Then B's salary is more than A's salary by

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

III     II       I   
100 150 120
Required percentage = (150/120) x 100% = 125%

According to the question,
Change in length of rectangle = - 50% = a
Change in breadth of rectangle = 100% = b
Net effect = a + b + (ab)/100 %
= - 50 + 100 + [(-50) (100) / 100]%
= 0%

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

CP of the chair which is sold at 25% of profit = Rs 4000/ (1+ 25%)
= Rs 4000/1.25
= Rs 3200

Now given, that sum of CP pf table and chair= sum of SP of table and Chair
? 8000= 3200 + CP of Table
? CP of Table = Rs 4800
? Loss on Cost price of table = Rs 4800- Rs 4000= Rs 8000
? Loss % = 8000/4800 = 16.66%

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