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NCERT Exemplar · Class 7 · Maths

Chapter 7: Comparing Quantities

Practice each question, then open the answer or worked solution.

Questions

70 questions
Q61Written answer

When an improper fraction is converted into percentage then the answer can also be less than 100.

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Worked solution

Solution:-

False

For example consider an improper fraction = 9/4

So, percentage of improper fraction = (9/4) × 100

= 225%

Q62Written answer

8 hours is 50% of 4 days.

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Worked solution

Solution:-

False

Let us assume 8 hours be Q% of 4 days

So, 8 = (Q/100) × 4 × 24

Q = 25/3

Q =
NCERT Exemplar Class 7 Maths Solutions Chapter 7 Image 13

Q63Written answer

The interest on ₹ 350 at 5% per annum for 73 days is ₹ 35.

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Worked solution

Solution:-

False

From the question it is given that, P = ₹ 350, R = 5%, T = 73 days = 73/365

As we know that,

I = (P × R × T)/100

I = (350 × 5 × 73)/ (100 × 365)

I = ₹ 3.5

Q64Written answer

The simple interest on a sum of ₹ P for T years at R% per annum is given by the formula: Simple Interest = ((P × R × T)/100)

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Worked solution

Solution:-

True

Q65Written answer

75% = (4/3)

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Worked solution

Solution:-

False

Because, 75 % = 75/100

= ¾

Q66Written answer

12% of 120 is 100.

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Worked solution

Solution:-

False

= (12/100) × 120

= 1440/100

= 14.4

Q67Written answer

If Ankita obtains 336 marks out of 600, then percentage of marks obtained by her is 33.6.

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Worked solution

Solution:-

False

From the question it is given that,

Ankita obtains 336 marks out of 600

So, percentage of marks = (336/600) × 100

= 0.56 × 100

= 56%

Q68Written answer

0.018 is equivalent to 8%.

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Worked solution

Solution:-

False

0.018 × 100 = 1.8%

Q69Written answer

50% of ₹ 50 is ₹ 25.

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Worked solution

Solution:-

True.

= (50/100) × 50

= 0.5 × 50

= ₹ 25

Q70Written answer

250 cm is 4% of 1 km.

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Worked solution

Solution:-

False

250 cm = 250/100

= 2.5 m

We know that, 1 km = 1000m

Then, 4 % of 1 km = (4/100) × 1000

= 40 m