# RD Sharma Solutions Class 7 Percentage Exercise 11.4

## RD Sharma Solutions Class 7 Chapter 11 Exercise 11.4

### RD Sharma Class 7 Solutions Chapter 11 Ex 11.4 PDF Free Download

#### Exercise 11.4

Q1. Find each of the following:

(i)7% of Rs.7150

$Rs.\left(\frac{7}{100}\times 7150 \right )\\=Rs.500.50$

(ii) 40% of 400Kg

$Kg.\left(\frac{40}{100}\times 400 \right )\\=160Kg$

(iii) 20% 0f 15.125litres

$litres.\left(\frac{20}{100}\times 15.125 \right )\\=3.025litres$

(iv) $3\frac{1}{3}$%  of 90km

$km.\left(\frac{10}{300}\times 90 \right )\\=3km$

( v) 2.5% of 600metres

$metres.\left(\frac{2.5}{100}\times 600 \right )\\=15metres$

Q2. Find the number whose $12\frac{1}{2}$% is 64.

Let the required  number be x. Then,

$12\frac{1}{2}\times x=64\\ 12.5\%\times x=64\\ \frac{12.5}{100}\times x=64\\ x=\frac{64\times100}{12.5}\\ =64\times8=512\\ Therefore\;x=512$

Q3. What is the number, $6\frac{1}{4}$%  of which is 2?

Let the required number be x. Then,

$6\frac{1}{4}\times x=2\\ 6.25\%\times x=2\\ \frac{6.25}{100}\times x=2\\ x=\frac{2\times100}{6.25}\\ =2\times16=32\\ Therefore\;x=32$

Q4. If 6 is 50% of a number, what is the number?

Let the required number be x. Then,

$50\%\;of\;x=6\\ \frac{50}{100}\times\;x=6\\ x=\frac{300\times2}{50}\\ \frac{600}{50}=12\\x=12$