Comparing Quantities Class 7 Worksheet Maths Chapter 7

Ans: (a)
60% = 60/100 = 6/10 = 3/5

Ans: (c)
3.05 x 100% = 305/100 x 100 = 305%

Ans: (c)
35% of 1 kg = 35/100 x 1 = 0.35 kg = 350 gm

Ans: (c)

20% of 1000G = 20/100 × 1000
= 200G

Ans: (b)
Suppose there are 100 students in class VII, 65 out of them have bicycles and the percentage of the students do not have bicycles
= (100 - 65)% = 35%

Sol: Given, out of 25 children, there are 10 boys. 
The percentage of boys = 10/25 x 100 = 40
There are 40% boys in the class.

Sol: Suppose there are 100 students in class VII, 65 out of them have bicycles and the percentage of the students do not have bicycles
= (100 - 65)% = 35%

Sol: Old price = Rs 250
New price = Rs 280
Change in price = Rs 280 - Rs 250 = Rs 30
Increase % = Change in price / Original price  × 100 
= 30/250 × 100
=12%

Sol:
Simple Interest (SI) = $\frac{}{}$Principal  x Rate × Time / 100

Total amount = Principal + SI = 7500 + 262.50 
= 7762.50

Sol: Given:
Principal (P) = Rs 6000
Rate of interest (R) = 3%
Time (T) = 3 years
Simple Interest (SI):
SI = P × R × T / 100 = 6000 × 3 × 3 /100 
=Rs. 540
Total Amount:
Amount = P + SI = 6000 + 540 
= Rs. 6540

Sol: Given. CP = Rs 10000 and profit = 10% 
Profit = 10% of Rs 10, 000 = 10/100 x 10000
= Rs. 1000

Sol: Given, marked price (MP) of an almirah = Rs 6, 000 and, discount = 12% of Rs 6000
= 12 / 100 x 6000 = Rs. 720
Sale price = MP - discount
= Rs (6000 - 720)
= Rs 5, 280

Sol: Given, Principal (P) = Rs 2,500
Rate of interest (R) = 5% p.a.
Time (T) = 3 years
Simple Interest (S.I.) = P x R x T / 100
= 2500 x 5 x 3 / 100 = Rs. 375

Sol: Old price = Rs. 2200
New price = Rs. 1770
Amount of change = Rs. 2200 - Rs. 1770 = Rs. 430
Increase % = Amount of change / original amount x 100
= 430/1770 x 100 = 24.29%

Sol: Selling Price (SP) = Rs 250
Loss = 20%
Cost Price (CP) = SP/(1−Loss Percentage)

= Rs. 312.50