Answer:
To convert 121 pounds into kilograms, we can use the conversion factor:
1 kg = 2.2 lb
Dividing both sides of this equation by 2.2, we get:
1 lb = 0.454545 kg (rounded to the nearest tenth, this is 0.5 kg)
Therefore, we can convert 121 pounds to kilograms by multiplying by 0.454545:
121 lb * 0.454545 kg/lb = 54.884545 kg
Rounding this to the nearest tenth gives:
54.9 kg
Therefore, 121 pounds is approximately equal to 54.9 kilograms when rounded to the nearest tenth.