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Live Lecture
Etymology: Percentage
Percent is from the Latin adverbial phrase per centum meaning “by the hundred.” The Latin phrase entered English in the 16th century. Later, it was abbreviated per cent.
Percentage and Fractions
Flashcard
Formula
Formula to find x percentage of “Total” = Total × x/100
More Questions
(CSIR-NET DEC 2012) 25% of 25% of a quantity is x% of the quantity, where x is
0.0625
That’s right!
0.125
That’s wrong! Hint: 25% of 25% of y = x% of y.
0.25
That’s wrong! Hint: 25% of 25% of y = x% of y.
0.5
That’s wrong! Hint: 25% of 25% of y = x% of y.
(CSIR-NET SEPT 2022 – PS) A plant grows by 10% of its height every three months. If the plant’s height today is 1m, its height after one year is the closest to
1.10m
That’s wrong! Hint: Plant grows by 10% of its height every three months, how much did it grow in 3rd month, and then from 3rd to 6th month and so on?
1.21m
That’s wrong! Hint: Plant grows by 10% of its height every three months, how much did it grow in 3rd month, and then from 3rd to 6th month and so on?
1.33m
That’s wrong! Hint: Plant grows by 10% of its height every three months, how much did it grow in 3rd month, and then from 3rd to 6th month and so on?
1.46m
That’s right
“
(CSIR-NET JUNE 2018) A water tank that is 40 % empty holds 40 L more water than when it is 40 % full. How much water does it hold when it is full?
100L
That’s wrong! Hint: “A water tank that is 40% empty holds 40L more water than when it is 40% full.”
That is, 40.100 x + 40 = 60/100 x. Then…
That is, 40.100 x + 40 = 60/100 x. Then…
75L
That’s wrong! Hint: “A water tank that is 40% empty holds 40L more water than when it is 40% full.”
That is, 40.100 x + 40 = 60/100 x. Then…
That is, 40.100 x + 40 = 60/100 x. Then…
120L
That’s wrong! Hint: “A water tank that is 40% empty holds 40L more water than when it is 40% full.”
That is, 40.100 x + 40 = 60/100 x. Then…
That is, 40.100 x + 40 = 60/100 x. Then…
200L
That’s right!
(CSIR-NET DEC 2016) A mine supplies 10,000 tons of copper ore, containing an average of 1.5 weight % copper, to a smelter every day. The smelter extracts 80% of the copper from the ore on the same day. What is the production of copper in tons/day?
80
That’s wrong!
12
That’s wrong!
120
That’s right!
150
That’s wrong!
(CSIR-NET DEC 2014) 20% of students of a particular course get jobs within one year of passing. 20% of the remaining students get jobs by the end of second year of passing. If 16 students are still jobless, how many students had passed the course?
32
That’s wrong!
64
That’s wrong!
25
That’s right!
100
That’s wrong!
(CSIR-NET DEC 2019 – ASSAM) In a cricket match, team A needed to score 20 runs to win in the last 12 balls, with players A1 and A2 batting. A1 faced 8 out of 12 balls with a strike rate (defined as number of runs scored per hundred balls faced) of 75. What is the least strike rate A2 needed to score at, for team A to win (assuming team A did not lose any more wickets or get any extra runs)?
250
That’s wrong!
300
That’s wrong!
350
That’s right!
375
That’s wrong!
A candidate should score 45% marks of the total marks to pass the exam. He gets 520 marks and fails by 20 marks. The total marks in the exam are:
1000
That’s wrong!
1100
That’s wrong!
1200
That’s right!
1400
That’s wrong!
(DBT JRF-2018, 2019) A boy appears for a test and scores 35% but fails by 10 marks. If he had scored 46% marks, he would have passed by 12 marks. The pass mark is:
70
That’s wrong!
74
That’s wrong!
80
That’s right!
86
That’s wrong!
(GATE- 2019) In a country of 1400 million populations, 70% own mobile phones. Among the mobile phone owners, only 294 million access the Internet. Among these Internet users, only half buy goods from e-commerce portals. What is the percentage of these buyers in the country?
14.7
That’s wrong!
15
That’s wrong!
10.5
That’s right!
50
That’s wrong!
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Christy's Classes 
Sir please upload finding x lecture study material.
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We are working on it! Will be posted today!😊
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It was posted right then. Hope you saw it!
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