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The ratio of the weight of an object on Mars to the weight of an object on Earth is $0.4$ to $1$ . How much will a $122 \, \text{lb}$ astronaut weigh on Mars?

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Multiply and divide decimals: word problems

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Q. The ratio of the weight of an object on Mars to the weight of an object on Earth is

0.4

to

1

. How much will a

122 \, \text{lb}

astronaut weigh on Mars?

Multiply Earth weight by ratio: To find the weight of the astronaut on Mars, we need to multiply the Earth weight by the ratio of Mars weight to Earth weight, which is $0.4$ . So, we calculate $122 \, \text{lb} \times 0.4$ .
Perform multiplication: Performing the multiplication: $122 \, \text{lb} \times 0.4 = 48.8 \, \text{lb}.$
Final weight on Mars: This result represents the weight of the astronaut on Mars. There are no further calculations needed.

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