Answer:
your real wage (salary) will decrease
Step-by-step explanation:
the change in a person's real wage = nominal wage - inflation rate
In order for your real wage to at least remain the same and not decrease with inflation, it must increase in the same proportion. The formula used to calculate real wage = nominal wage / (1 + change in the CPI)
Many labor contracts, specially unionized labor agreements, use cot-of-living clauses which adjust wages to CPI increases. It doesn't apply when the CPI decreases though.