What is nine tenth divide two fifth?

To divide nine-tenths (9/10) by two-fifths (2/5), you can multiply by the reciprocal of the second fraction. This means you calculate ( \frac{9}{10} \times \frac{5}{2} = \frac{45}{20} ). Simplifying this fraction gives you ( \frac{9}{4} ) or 2.25.