As in multiplication of fractions, division also has 3 simple steps. Let us do that here.
Before dividing, find the reciprocal of the second fraction (i.e. flip the numbers of numerator and denominator). By doing it, 4/5 becomes 5/4.
Now, multiply the first fraction with the reciprocal of the second.
Reduce the result of this division, if possible.
Dividing division of fractions is made easier here.