Correct Answer - Option 2 : 225
Formula used:
Percentage = (Part value/Original value) × 100
Calculation:
The number C is \(28_7^4\% \) of 980
⇒ 980 × (200/7) × (1/100)
⇒ 280
The number B is \(87_2^1\% \) more than C
⇒ 280 × (375/2) × (1/100)
⇒ 525
The number A is \(42_7^6\% \) of number B
⇒ 525 × (300/7) × (1/100)
⇒ 225
∴ The number A is 225.