Question

5. John spent 5600 out of 10,000. He purchased a watch as a gift
for his grandfather. What percentage of money did he spend?
6. Find the percentage of water in a person weighing 45 kg, if the
human body consists of of water by weight.
7.
of the household work is done by my mother. What per cent of the
household work is done by her?​

Answer 1

Answer:5).56%

Step-by-step explanation:5600÷10000×100=56%

Answer 2

(1)

Given: John spent 5600 out of 10,000. He purchased a watch as a gift

for his grandfather.

To find: Percentage of money spent by John.

Solution:

Total amount = 10,000

Amount spent by John = 5600

The percentage is the number expressed as a fraction of 100. It is expressed with the sign '%'.

So, percentage = $\frac{Amount spent}{Total amount}$ × 100

⇒ Percentage = $\frac{5600}{10000}$ × 100

⇒ Percentage = 56%

Thus, John spent 56% of his money.

(2)

Given: A person weighs 45 kg and the  human body consists of 2/3 of water by weight.

To find: Percentage of water in the person.

Solution:

Weight of person = 45 kg

Fraction of water in the body = $\frac{2}{3}$

So, the weight of water in the body = $\frac{2}{3}$ × person's weight

⇒ Weight of water in body = $\frac{2}{3}$ × 45 = 30 kg

Now, percentage of water in body = $\frac{weight of water in body}{body weight}$ × 100

⇒ Percentage of water in body = $\frac{30}{45}$ × 100 = 66.67%

Thus, the percentage of water in a person weighing 45 kg is 66.67%.

(3)

Given: 3/4 of the household work is done by my mother.

To find: Percent of the  household work is done by her.

Solution:

Let the total work to be done = x

As the mother does three-fourth of the work,

So work done by mother = $\frac{3x}{4}$

Now, the percentage of work done by mother = $\frac{work done by mother}{total work to be done}$ × 100

So, percentage of work done by mother = $\frac{\frac{3x}{4} }{x}$ × 100

⇒ Percentage of work done by mother = $\frac{3}{4}$ × 100 = 75%

Thus, the percent of the household work done by the mother is 75%.