To determine the ratio in which 56 kg must be decreased to become 42 kg, we first calculate the difference between the two weights: 56 kg - 42 kg = 14 kg. This is the amount that needs to be decreased. To find the ratio, we divide this difference by the original weight: 14 kg / 56 kg = 0.25. Therefore, 56 kg must be decreased in a ratio of 0.25 to become 42 kg.
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