If 128 is added in a number then result becomes 157\(\frac{1}{7}\) % of itself. Find the number.
Answer & explanation
Correct answer: option 4
157\(\frac{1}{7}\)% = 100 + 57\(\frac{1}{7}\)
↓ ↓
Original amount added
57\(\frac{1}{7}\)% = \(\frac{4}{7}\) [4 is added, 7 is original]
4 → 128
7 → \(\frac{128}{4}\) = 224