? A - 20% of A = 40
? A - A/5 = 40
? 4A/5 =40
? A = (5 x 40)/4 = 50.
Required percent = {30/(2 x 10)} x 100 % = 150%
Let 75% of 480 = A x 15.
? (75 x 480)/100 = 15A
? A = (75 x 480)/ (100 x 15) = 24
Required percent = [(3/100) / (5/100)] x 100]%
= [(3/100) x (100/5) x 100] %
= 60%
? 0.5/100 of A = 85/100
? A = Rs. (85 / 0.5) = Rs. 170
Let 45 x A = (25 x 900)/100
? A = (25 x 9)/45 = 5
Let x% of y = y% of A, then
? xy / 100 = yA/100
? A = (xy/100) x (100/y) = x
Let 12.5% of 192 = 50% of A,
?(12.5 x 192) / 100 = (50 x A) / 100
? A = (12.5 x 192) / 50 = 48
Let 371/2% of A = 900
? {(75/2) x A} x 100 = 900
? A = (900 x 2 x 100) / 75 = 2400
So, 621/2% of A = (125/2) x (1/100) x 2400 =1500
Let A - 6% of A = AB.
? (94 x A) / 100 = AB
? B = 0.94
It is (30 x 80)/100 - (4 x 25)/ 5 = 24 - 20 = 4
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