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Every week the weight of a puppy increases by 17%.
If the puppy weighs 2.1kg, what is its weight one week later, to the nearest 0.1 kilogram?
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The puppy weighs 2.1 and its weight increases by 17% over the week, so at the end of the week the puppy weighs 100+17=117% of its initial weight.
That is
2.1×117100=2.5kg
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