In this case, the starting amount is 525 pounds. You want to convert it into kilograms so you need to know the equal amount of pounds into one kilogram. The equal amount is: 1kilogram/ 2.2 pounds.
To convert it you simply need to multiply the starting amount with the equal amount, then the calculation is:
525 pounds x 1 kilogram/2.2pound= 525 kilogram / 2.2= 238.63 kilograms.
Then the end amount is 238.63 kilograms