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The deci- prefix means one tenth (1/10)

→ 1 dg = 1/10 g

The milli- prefix means one thousandth (1/1000)

→ 1 mg = 1/1000 g

→ 7 mg ÷ 1 dg = (7 x 1/1000 g) ÷ (1 x 1/10 g)

= 7/1000 ÷ 1/10

= 7/1000 x 10/1

= 7/100

= 0.07

Meaning there are 0.07 dg in 7 mg

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11y ago

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