Question

Mohit's weight is $40$ kg and Rohan's weight is $35$ kg. By what percentage is Rohan's weight less than that of Mohit?

Answer 1

Note : When a quantity changes from time to time, we find percentage change in the quantity.
For example, the price of an article is Rs.20 in the year 2005 and it became Rs.24 in the year 2006.
The percentage in change in the article is $\frac{4}{10}\times 100=20\%$ increase.
Percentage change can be defined as
$\frac{finalvalue-initialvalue}{Initialvalue}\times 100$.
Percentage change could be increase or decrease.

$\left(\frac{40-35}{40}\right)\left(100\right)\%=12.5\%$