5.Mallapragada's. Mathematics {PERCENTAGE – (1)}

                         Om  Sri Ram

{PERCENTAGE – (1)}

Sl.No.	Objective Type Questions	Ans.
1	Express as a fractions (a) 75 %, (b) 0.08%
2.	Express as a decimal:(a) 30 %,(b) 0.04%
3.	Express as ret percent: (a)  0.005,          (b) 5 3/4
4.	Evaluate: 25% of 450 + 50 % of 300
5.	5  2/5 % of 500 gm – 33 1/3 of 180 gm
6.	5 is what percent of 50 ?
7.	½ is what percent of ¼ ?
8.	what percent of 5 is 90 ?
9.	What percent of 5 metric tonnes is 50 quintals?
10.	What percent of 7.5 liters is 150 ml. ?
11.	The ration 4:5  expressed as percent ?
12.	Half of 1 percent written as a decimal is:
13.	What is 20 percentage of Rs 50 ?
14.	63% of 3 4/7 is ?
15.	500 % of 50 + 50 % of 500 = ?
16.	? % of 25 = 2.125
17.	Which is greatest is 162/3 % ,2/15 and 0.17
18.	What percent of Rs. 2650 is Rs. 1900
19.	What percent of a day is 6 hours ?
20.	5 % of (25 % of Rs. 1500) is
21.	500 is 50 % of ?
22.	An agent gets a commission of 4.5% on the sales of cloth.  If on a certain day. He gets Rs. 25.50 as commission, the cloth sold through him on that day is worth.
23.	15% of x % of 600 = 21 find x ?
24.	25 % of number is 150 than what percent of 175 is that number
25.	One third of two fifth of a number is 15. What is 40 % of that number.
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{PERCENTAGE – (1)}(Solved Examples)

Sl.No.	Objective Type Questions
1	Express as a fractions (a) 75 %, (b) 0.08% Ans.(a) 75% = 75/100 = ¾, 0.008%=          8/1000x1/100 = 8/100000= 1/12500
2.	Express as a decimal:(a) 30 %,(b) 0.04% Ans.(a) 30% = 30/100 = 3/10=0.3 (b) 0.04%         04/100 x 1/100 = 0.0004
3.	Express as ret percent: (a)  0.005,  (b) 5 ¾ Ans. (a)  0.005= (5/1000 x 100)% = 0.5%            (b) 5 ¾ = (23/4 x 100)% = 575%
4.	Evaluate: 25% of 450 + 50 % of 300 Ans. 25/100 x 450  + 50/100 x 300 =          1/4x450 + ½ x 300= 112.5 + 150=262.5
5.	5  2/5 % of 500 gm – 33 1/3 of 180 gm Ans. 2/5x1/100x500 -100/3 x 180 = 2/500x500 – 100 x 60 = 2-600 = -598
6.	5 is what percent of 50 ? Ans.5/50 x 100 = 10%
7.	½ is what percent of ¼ ? Ans. ½ x 4/1 = 2%
8.	what percent of 5 is 90 ? Ans.90/5 x 100 = 1800%
9.	What percent of 5 metric tonnes is 50  quintals? Ans. 1 meter tonne is 10          (40/5 x 10    x 100)% = 80%
10.	What percent of 7.5 liters is 150 ml. ? Ans. (150/7.5 x 1000  x 100 )% =2 %
11.	The ration 4:5  expressed as percent ? Ans.(4/5 x 100)% = 80 %
12.	Half of 1 percent written as a decimal is: Ans. (½ x 1/100)= 0.5/100 = 0.005
13.	What is 20 percentage of Rs 50 ? Ans. 20/50 x 100 = 40 =Rs. 4.0
14.	63% of 3 4/7 is ? Ans. 63/100 x 25/7 =63 x 25/700 = 9/4=4/9=2.25
15.	500 % of 50 + 50 % of 500 = ? 500   x 50  + 50  X 500 = 500      100              100
16.	? % of 25 = 2.125 Ans. x % of 25 = 2.125, x/100 x 25 = 2.125         X = 2.125 x 4 = 8.5
17.	Which is greatest is 162/3 % ,2/15 and 0.17 Ans.{50/3  x 1/100 } =1/6 = 0.166 {2/15 } = 0.133         Clearly 0.17 is greatest
18.	What percent of Rs. 2650 is Rs. 1900 Rs. Required percentage =1900/2650 x 100%  =1900/265 x 10 = 19000/265 =71.69%
19.	What percent of a day is 6 hours ? Ans.6/24  x 100 = 25 %
20.	5 % of (25 % of Rs. 1500) is Ans. 5/100 x ( 25/100 x 1500 )=5/100x375=          5/4 x 15 = 75/4 = Rs.  18.75
21.	500 is 50 % of ? Ans. 50 % of x =500 50/100 x=500  = x=500x100/50 = 1000
22.	An agent gets a commission of 4.5% on the sales of cloth.  If on a certain day. He gets Rs. 25.50 as commission, the cloth sold through him on that day is worth Ans. Let Sale of cloth =x 4.5% x =Rs. 25.50 X= 2550/100  x 10 x100/45 = 25500/45 =566.6 = rounded 567 Rs.
23.	15% of x % of 600 = 21 find x Ans. 15/100 x x/100 x600 -21          x/100 = 21 x 100/15 x 1/600= 21/90           x = 2100/90 = 23.33
24.	25 % of number is 150 than what percent of 175 is that number Ans. Let the number be x           25 % of x = 150           The x = 150 x100/25 = 600            Let y % of 175 =600 =y/100 x 175=600            Y = (600 x 100)/175 = y=60000/175=                   342.85
25.	One third of two fifth of three seventh of  a number is 15. What is 40 % of that number. Ans.1/3x2/5x 3/7 x x = 15          X= (15x 3 x 5 x 7)/2 x 3 =525/2           40% of x = 40/100 x 525/2           =40x525/200 = 105