Answer:
The fraction as a converting factor is 1/1,000
Step-by-step explanation:
we know that
1 kg=1,000 g
using proportion
Let
x ----->the amount in kilograms
[tex]\frac{1,000}{1}\frac{g}{kg}=\frac{42}{x}\frac{g}{kg} \\\\x=42(\frac{1}{1,000})\\\\x=0.042\ kg[/tex]
therefore
The fraction as a converting factor is 1/1,000
