Question

40 centimetre to 1.5 millimetre

Answer 1

$\bf \: 40 \: cm \: = (40 \times 10) \: mm \\ \bf \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 400 \: mm$

And,

$\bf1.5 \: mm = \frac{15}{10} \: mm$

Now,

$\frak{Ratio = \frac{400}{ \frac{15}{10} } = \frac{400 \times 10}{15} } \\ \\ \: \: \: = > \frac{4000}{15} = \frac{800}{3} \\ \\ \\ \: \: \: = > \huge { \frak{ \red{800 : 3}}}$