Write the ratio 1.6 : 4 as a fraction in simplest form, with whole numbers in the numerator and denominator.

1.6 : 4

1.6 is also equal to 8/5

therefore,

8/5 : 4

(8/5) / 4

**get the reciprocal of the denominator (4) which is equal to 1/4**

(8/5) * (1/4)

(8/4) * (1/5)

2 * (1/5)

2/5

two fifth is the answer