Simple Explanation
Increase \(225 - 180 = 45\) है। Percentage increase \(\frac{45}{180} \times 100 = 25\%\) होता है। इसलिए दूसरा विकल्प सही है। 45 केवल absolute increase है, percentage नहीं। परीक्षा में original value को denominator बनाकर percentage increase calculate करें। Final density unit calculation में cancel हो जाती है क्योंकि percentage dimensionless होता है। / The increase is \(225 - 180 = 45\). Percentage increase is \(\frac{45}{180} \times 100 = 25\%\). Therefore, the second option is correct. The value 45 is only the absolute increase, not the percentage increase. In examinations, use the original value as the denominator when calculating percentage increase. Density units cancel in the ratio because a percentage is dimensionless.
