Question

3. 35% of a certain number is 252. Find the number. Also, find its 25%.

[Please do answer it correctly. If you don't know the answer, no problem. But, don't give answers like "I don't know" or "Mark me the brainliest" (without answering the question. You'll be reported.) I'll mark you as the brainliest if you answer it correctly. TIA, if you've answered it correctly.]

Answer 1

Answer:

(i) Let the number be x

By the given condition,

252 = (x × 35)/100 = (x × 7)/20

∴ x = (252 × 20)/7 = 36 × 20 = 720

Hence reqd. number = 720

(ii) Let the number be x

By the given condition,

315 = (x × 14)/100

∴ x = (315 × 100)/14 = (45 × 100)/2 = 45 × 50 = 2250

Answer 2

Answer:

$let \: the \: number \: be \: x \\ \\ \frac{35}{100} \times x = 252 \\ \\ x = 252 \div \frac{35}{100} \\ \\ x = 252 \times \frac{100}{35} \\ \\ x = \frac{25200}{35} \\ \\ x = 720$

$25\% \: of \: 720 \\ = \frac{25}{100} \times 720 \\ \\ = \frac{25}{10} \times 72 \\ \\ = \frac{5}{2} \times 72 \\ \\ = \frac{5}{1} \times 36 \\ \\ = 5 \times 36 \\ \\ = 180$