Find the ratio between:
$400 g r a m s a n d 3 K g$

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Solution

As $3 kg = 3 \times 1000 grams = 3000 grams [∵ 1 k g = 1000 g r a m s]$
Ratio between $400 g r a m s a n d 3 K g$
$= \frac{400 g r a m s}{3 k g} = \frac{400 g r a m s}{3000 g r a m s} = \frac{400}{3000} = \frac{4}{30} = \frac{2 \times 2}{2 \times 15} = \frac{2}{15}$
Hence required ratio is $2 : 15$

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