Question

No.3 Express each of the following as required.

Example - Express 45 p as a percent of Rs.27

45

.27

=

45

2700

X 100 % = 5

3

% = 12

3

%

a) 90m as a percent of 3 km. (1km=1000m)

b) 120 grams as a percent of 2kg.(1kg=1000g)

c) 9 hours as a percent of 1day.(1 day =24 hours)

d) 28p as a percent of Rs.1.40. please give answer by step-by-step and if you don't know then don't give answer ​

Answer 1

Answer:

a) 3 km= 3000m

90/3000×100= 3%

b) 2 kg= 2000g

120/2000×100= 6%

c) 1 day= 24 hours.

9/24×100= 37.5%

d) 1 rupees= 100 paise.

1.40 rupees= 100+40= 140 paise.

28/140×100= 20%

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Answer 2

Answer:

a) 90m as a percent of 3 km

3 km = 3000m

$\frac{90}{3000} \times 100 \\ = \frac{9}{3} \\ = 3\%$

b) 120 grams as a percent of 2 kg

2kg = 2000 g

$\frac{120}{2000} \times 100 \\ = \frac{12}{2} \\ = 6\%$

c) 9 hours as a percent of 1 day

1 day = 24 hours

$\frac{9}{24} \times 100 \\ = \frac{3}{8} \times 100 \\ = \frac{3}{4} \times 50 \\ = \frac{ 3 }{2} \times 25 \\ = 1.5 \times 25 \\ = 37.5\%$

d) 28 p as a percent of 1.40 rs

1.40 rs = 140 p

$\frac{28}{140} \times 100 \\ = \frac{28}{14} \times 10 \\ = 2 \times 10 \\ = 20\%$

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