Question

Ch-10 Percentage and Its applications I want answer of Q2,4,6 Read Question properly ​

Answer 1

Answer:

see from the above picture and get ur solution

Answer 2

There are two things we need to remember throughout this question:

⇒ Percentage is a fraction with the denominator 100. So, 1% is equal to 1/100, 2% is equal to 2/100 and so on.

⇒ When we say 'of', we mean to multiply. For example, " ⅖ of 10 chocolates " = ⅖ x 10 = 4 chocolates

Answers:

ii) 0.25% of 96

Let us convert the percentage into a fraction. We remove the percentage symbol and make the denominator 100.

$\sf{We\:get\:\dfrac{0.25}{100}\:=\:\dfrac{25}{1000}$

Since, 'of' represents multiplication, we have to multiply 25/1000 and 96.

$\sf{=\:\dfrac{25}{1000}\times\dfrac{96}{1}}$

Cancelling,

$\sf{=\:\dfrac{1}{40}\times\dfrac{96}{1}$

$\sf{=\dfrac{96}{40}}$

Cancelling,

$\sf{=\:\dfrac{24}{10}}$

$\sf{=\:0.24}$

Therefore, 0.25% of 96 is 0.24.

$\bf{iv)\:6\dfrac{2}{3}\%\:of\:87}$

Now we have a mixed fraction with the percentage symbol. Let us convert it into an improper one.

$\sf{6\dfrac{2}{3}=\dfrac{(6\times3)+2}{3}=\dfrac{20}{3}}$

As 'of' means multiplying, we multiply 20/3 by 87, with the denominator 100.

$\sf{=\dfrac{\dfrac{20}{3}\times87}{100}}$

Keeping this fraction in our minds, let us first solve the numerator part.

$\sf{\Rightarrow \dfrac{20}{3}\times87}}$

Cancelling,

$\sf{=\dfrac{20}{1}\times29}}$

$\sf{=580}$

Now, we have:

$\sf{=\dfrac{580}{100}}$

Cancelling the zeroes,

$\sf{=\dfrac{58}{10}$

$\sf{=5.8}$

$\bf{\underline{Therefore,\:6\dfrac{2}{3}\%\:of\:8=5.8}}$

vi) 9% of 6 litres

Converting the percentage into a fraction,

$\sf{9\%=\dfrac{9}{100}}$

Substituting × for 'of',

$\sf{=\dfrac{9}{100}\times6}$

$\sf{=\dfrac{54}{100}}$

$\sf{=0.54}$

Therefore, 9% of 6 litres is 0.54.