A person weighed 180 lb. Three months later, they weighed 160 lb. What is the percentage of weight the person lost over 3 months? (Round to the nearest percent.)

Rationale

The person lost 20% of their weight over 3 months.

To calculate the percentage of weight loss, we subtract the final weight from the initial weight to find the total weight lost. Then we divide the weight lost by the initial weight and multiply by 100 to convert the fraction to a percentage.

A (13%) YOUR ANSWER

This answer would be incorrect because the person lost more than 13% of their weight. We calculate the percentage of weight lost as (180lb - 160lb) / 180lb * 100 = 20%.

C (10%) YOUR ANSWER

This answer would be incorrect because the person lost more than 10% of their weight. Using the same calculation as above, we find that the person lost 20% of their weight, not 10%.

D (5%) YOUR ANSWER

This answer would be incorrect because the person lost significantly more than 5% of their weight. As calculated previously, the correct percentage of weight lost is 20%.

Conclusion

The correct answer to the question "What is the percentage of weight the person lost over 3 months?" is 20%. This is calculated by subtracting the final weight from the initial weight, dividing the result by the initial weight, and then multiplying by 100 to convert the fraction to a percentage. The other choices (13%, 10%, and 5%) are all less than the correct answer and hence are incorrect.

A person weighed 180 lb. Three months later, they weighed 160 lb. What is the percentage of weight the person lost over 3 months? (Round to the nearest percent.)

The person lost 20% of their weight over 3 months.

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