How much would you weigh on the moon if you were 99 lbs?

To calculate your weight on the Moon, you can use the fact that the Moon's gravity is about 1/6th that of Earth's. If you weigh 99 lbs on Earth, you would weigh approximately 16.5 lbs on the Moon (99 lbs divided by 6). Thus, your weight would be significantly less due to the Moon's weaker gravitational pull.