Let Z = 100, X = 100 - 30 = 70
Y = 100 - 35 = 65
? Y is less by X = (70 - 65)/70 x 100%
= 5/70 x 100% = 71/7 %
Minimum passing marks = 50 + 50 = 100
Let the total marks = x
Then, 50% of x = 100
? x = (100/50) x 100 = 200
?(3.6/100) x 40
= ?1.44 = 1.2
Salt in 6 liter = 5% of 6 = 0.30 liter
Salt in new solution = (0.30/5) x 100% = 6%
Let original price = Rs. 100
? Increase price = Rs. 160
? Decrease on Rs. 160 = Rs. 60
? Decrease on Rs. 100 = (60/160) x 100 % = 371/2%
? 200% of N = 90
? N = (90 x 100) / 200 = 45
? 80% of N = (80 x 45) / 100 = 36
Profit or loss percent = ab/100 %
= (20 x 20)/100 %
= -4%
5% of 50% of 500
= (5/100) x (50/100) x 500
= 12.5
20% of N =90
? N x (20/100) = 90
? N = 90 x 5 = 450
89% of ? + 365 = 1075.22
? (89/100) x ? = 1075.22 - 365
? ? = 71022/89 = 798
Given, P = 15, Q = 20 and R = 25
According to the formula
R% of A = [(QR)/P]% of B
25% of A = (20 x 25)/15 % of B
= 100/3 % of B
= 331/3 % of B
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