New Learning Composite Mathematics Class 5 S.K. Gupta Anubhuti Gangal Commercial Arithmetic (Percentage, Profit and Loss) Chapter 15B Solution
New Learning Composite Maths Class 5 S.K. Gupta Anubhuti Gangal Commercial Arithmetic (Percentage, Profit and Loss) Chapter 15B Solution by expert Math Teacher.
Learning Composite Maths Class 5 Commercial Arithmetic (Percentage, Profit and Loss) 15B
Self practice 15B
1) Fill in the blanks
a) The word per cent means _(Per hundred)_
b) 32 per cent means __(32/100)__
c) (74/100) is the same as __(74%)__
d) The symbol % is the sign for __(Per cent)__
2) Write each of the following as percentage.
a) 30/100
= 30%
b) 8/100
= 8%
c) 12/100
= 12%
d) 27/100
= 27%
e) 43/100
= 43%
f) 100/100
= 100%
3) Write each of the following as a fraction with 100 as denominator.
a) 18%
=18/100
b) 4%
= 4/100
c) 41%
= 41/100
d) 92%
= 92/100
e) 112%
=112/100
4) Write each of the following, first as a fraction with 100 as denominator and then as a percentage.
a) 0.112
Fractional form = 11.2/100
Percentage form = 11.2%
b) 0.18
Fractional form = 18/100
Percentage form = 18%
c) 0.04
Fractional form= 4/100
Percentage form= 4%
d) 0.313
Fractional form= 31.3/100
Percentage form= 31.3%
e) 0.127
Fractional form= 12.7/100
Percentage form = 12.7%
f) 6.34
Fractional form= 634/100
Percentage form= 634%
5) Write each of the following as a decimal.
a) 75% = 0.75
b) 7% = 0.07
c) 1% = 0.01
d) 25% = 0.25
e) 90% = 0.90
f) 125% = 1.25
g) 3.6% = 0.036
h) 74.1% = 0.741
6) Express each of the following as a fraction with lowest terms.
a) 44% = 44/100 = 11/25
b) 10% = 10/100 = 1/10
c) 24% = 24/100 = 6/25
d) 96% = 96/100 = 24/25
e) 60% = 60/100 = 3/5
7) Express each of the following as a fraction with lowest terms.
a) 12.5% = 12.5/100 = 1/8
b) 22(1/2)% = 22.5/100 = 9/40
c) 6(1/4)% = 6.25/100 = 1 /16
d) 112(1/2)% = 112.5/100 = 9/8
e) 75.5% = 75.5/100 = 151/200
8) Which of the following is equivalent to 8%?
a) 8 b) 0.8 c) 0.08 d) 0.008
Ans:
If we evaluate all the options we can see that
a) 8 = 8×100% = 800%
b) 0.8 = 0.8×100% = 80%
c) 0.08 = 0.08×100% = 8%
d) 0.008 = 0.008×100% = 0.8%
∴ 0.08 is equivalent to 8%
9) Change each of the following fractions into a percentage.
a) (4/5) = (4/5) × 100% = 80%
b) 3/10 = (3/10) × 100% = 30%
c) 11/20 = (11/20)×100% = 55%
d) 4(3/5) = (23/5) × 100% = 460%
e) 18/40 = (18/40) × 100% = 45%
10) Change each of the following into a percentage.
a) 4 = 4×100% = 400 %
b) 8 = 8×100% = 800%
c) 1 = 1×100% = 100%
d) 12 = 12×100% = 1200%
e) 25 = 25×100% = 2500%
11) Change each of the following decimals into a percentage.
a) 1.4 = 1.4×100% = 140%
b) 0.48 = 0.48×100% = 48%
c) 0.05 = 0.05×100% = 5%
d) 3.65 = 3.65×100% = 365%
e) 5.50 = 5.50×100% = 550%
f) 4.05 = 4.05×100% = 405%
g) 0.02 = 0.02×100% = 2%
h) 16.5 = 16.5×100% = 1650%
i) 4.03 = 4.03×100% = 4.03%
12) Which of the following is equivalent to 2.02?
a) 202% b) 202.2% c) 2.02% d) 20.20%
Ans: If we evaluate all the options we will get
a) 202% = 202/100 = 2.02
b) 202.2% = 202.2/100 = 20.22
c) 2.02% = 2.02/100 = 0.0202
d) 20.20% = 20.20/100 = 0.2020
so we can see that option a) 202% = 2.02
Composite class 5 Commercial Arithmetic 15B