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• maxloo · 26 Jun 2026, 19:45 · official answer 1

  Convert Mary's mass to grams$$53\text{ kg} = 53 \times 1000\text{ g} = 53000\text{ g}$$ Sister's mass in grams$$53000\text{ g} - 700\text{ g} = 52300\text{ g}$$ Convert sister's mass to kilograms$$52300\text{ g} = \dfrac{52300}{1000}\text{ kg} = \boxed{52.3\text{ kg}}$$

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• maxloo · 26 Jun 2026, 19:45 · official answer 2

  Convert difference to kg$$700\text{ g} = \dfrac{700}{1000}\text{ kg} = 0.7\text{ kg}$$ Sister's mass$$53\text{ kg} - 0.7\text{ kg} = \boxed{52.3\text{ kg}}$$

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