Respuesta :

Answer:

The ratio of a to c is 17/21.

Step-by-step explanation:

We can represent b as 1.05a as b is 5% more than a.

We can represent b as 0.85c as b is 15% less than c or 85% of c.

It becomes:

1.05a = 0.85c

1.05a/c = 0.85

a/c = 0.85/1.05

a/c = 17/21